Finding the Fourth Proportional to 86,019,708.20, 129,029,562.30 and 77,260,821.80
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Solution
The fourth proportional to 86,019,708.20, 129,029,562.30 and 77,260,821.80 is: 115,891,232.70
Step by Step Solution
- Step 1: Write the proportion equation
86,019,708.20 : 129,029,562.30 = 77,260,821.80 : x - Step 2: Convert to fraction form
86,019,708.20/129,029,562.30 = 77,260,821.80/x - Step 3: Cross multiply
86,019,708.20x = 129,029,562.30 × 77,260,821.80 - Step 4: Simplify right side
86,019,708.20x = 9,968,930,019,792,298 - Step 5: Solve for x
x = 9,968,930,019,792,298/86,019,708.20 - Step 6: Final answer
x = 115,891,232.70
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.