Installment Loan
1. **State the problem:** Calculate the quarterly payment for a $12000 motorcycle loan over 5 years at an annual interest rate of 7.2%, with payments made quarterly.
2. **Formula used:** The payment for an installment loan with compound interest and regular payments is given by the amortization formula:
$$ P = \frac{r \times PV}{1 - (1 + r)^{-n}} $$
where:
- $P$ is the payment per period,
- $PV$ is the present value or loan amount,
- $r$ is the interest rate per period,
- $n$ is the total number of payments.
3. **Identify variables:**
- Loan amount $PV = 12000$
- Annual interest rate = 7.2% = 0.072
- Number of years = 5
- Payments per year = 4 (quarterly)
4. **Calculate interest rate per period:**
$$ r = \frac{0.072}{4} = 0.018 $$
5. **Calculate total number of payments:**
$$ n = 5 \times 4 = 20 $$
6. **Substitute values into the formula:**
$$ P = \frac{0.018 \times 12000}{1 - (1 + 0.018)^{-20}} $$
7. **Calculate denominator:**
$$ 1 + 0.018 = 1.018 $$
$$ (1.018)^{-20} = \frac{1}{(1.018)^{20}} \approx \frac{1}{1.432364} \approx 0.6985 $$
$$ 1 - 0.6985 = 0.3015 $$
8. **Calculate numerator:**
$$ 0.018 \times 12000 = 216 $$
9. **Calculate payment:**
$$ P = \frac{216}{0.3015} \approx 716.68 $$
**Final answer:** The quarterly payment is approximately $716.68.