Answer and Explanation:
The rule of 72 refers the time period in which your investment which you invest should be doubled
So based on the rule of 72, the computation is shown below:
1. doubling time for France per capita real GDP is
= Rule of 72 ÷ rate
= 72 ÷ 1.9
= 37.89 years
2. Doubling time for Korea per capita real GDP is
= Rule of 72 ÷ rate
= 72 ÷ 4.2
= 17.14 years
3. France per capita real GDP in year 2045 is
= Per capita read GDP × (1 + growth rate)^time period
= $28,900 × 1.019^42
= $63,710.88
4. Korea per capita real GDP in year 2045 is
= Per capita read GDP × (1 + growth rate)^time period
= $12,700 × 1.042^42
= $71,490.43
The time period 42 comes from
= 2045 - 2003
= 42 years