Finding the Fourth Proportional to 72,129,132.16, 99,540,609.60 and 39,534,167.68
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Solution
The fourth proportional to 72,129,132.16, 99,540,609.60 and 39,534,167.68 is: 54,558,470.80
Step by Step Solution
- Step 1: Write the proportion equation
72,129,132.16 : 99,540,609.60 = 39,534,167.68 : x - Step 2: Convert to fraction form
72,129,132.16/99,540,609.60 = 39,534,167.68/x - Step 3: Cross multiply
72,129,132.16x = 99,540,609.60 × 39,534,167.68 - Step 4: Simplify right side
72,129,132.16x = 3,935,255,150,895,817.50 - Step 5: Solve for x
x = 3,935,255,150,895,817.50/72,129,132.16 - Step 6: Final answer
x = 54,558,470.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.