College

For each of the following situations involving annuities, solve for the unknown. Assume that interest is compounded annually and that all annuity amounts are received at the end of each period. (i = interest rate, and n = number of years)

(FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1, and PVAD of $1)

(Use appropriate factor(s) from the tables provided.)

| Present Value | Annuity Amount | i | n |
| -------------- | --------------- | --- | --- |
| ? | 3000 | 8% | 5 |
| 242980 | 75000 | ? | 4 |
| 161214 | 20000 | 9% | ? |
| 500000 | 80518 | ? | 8 |
| 250000 | ? | 10% | 4 |

Answer :

In the provided annuity scenarios, calculations were performed to find missing values using the Present Value of Annuity (PVA) formula. Key results include determining the periodic payment for a given present value annuity and solving for time, interest rate, and present value in various situations.

In the given annuity situations, we are tasked with solving for the unknown values using the appropriate factor(s) from the tables provided for Present Value of Annuity (PVA). The formula for PVA is:

[tex]\[ PVA = PMT \times \frac{1 - (1 + i)^{-n}}{i} \][/tex]

Calculating the missing values:

1. For the first situation (n=1, PVA=3000, i=8%), the missing PMT is [tex]\( \frac{3000 \times 0.08}{1 - (1 + 0.08)^{-1}} \)[/tex], resulting in approximately $2429.80.

2. In the second case (n=52, PMT=75000, i=8%), we find the PVA using the formula. The result is approximately $4,500,000.

3. For the third scenario (PMT=20000, i=9%, PVA=161214), we calculate n as [tex]\( \frac{1 - (20000 \times 0.09)}{-161214} \)[/tex], resulting in approximately 4 years.

4. In the fourth case (PMT=500,000, n=4, i=10%), the PVA is [tex]\( \frac{500,000 \times (1 - (1 + 0.10)^{-4})}{0.10} \)[/tex], resulting in approximately $1,805,180.

5. In the fifth situation (n=85, PVA=250,000, i=?), we find i using the formula [tex]\( i = \left(1 - (1 + i)^{-n}\right) \div PVA \)[/tex], resulting in approximately 4.67%.