Finding the Fourth Proportional to 7,128,129.80, 10,690,121.10 and 3,934,785.80
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Solution
The fourth proportional to 7,128,129.80, 10,690,121.10 and 3,934,785.80 is: 5,901,034.06
Step by Step Solution
- Step 1: Write the proportion equation
7,128,129.80 : 10,690,121.10 = 3,934,785.80 : x - Step 2: Convert to fraction form
7,128,129.80/10,690,121.10 = 3,934,785.80/x - Step 3: Cross multiply
7,128,129.80x = 10,690,121.10 × 3,934,785.80 - Step 4: Simplify right side
7,128,129.80x = 42,063,336,704,560.38 - Step 5: Solve for x
x = 42,063,336,704,560.38/7,128,129.80 - Step 6: Final answer
x = 5,901,034.06
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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.