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Finding the Third Proportional to 87,915,332 and 129,238,869

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Solution

The third proportional to 87,915,332 and 129,238,869 is: 189,986,034.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,915,332 : 129,238,869 = 129,238,869 : x
  2. Step 2: Convert to fraction form
    87,915,332/129,238,869 = 129,238,869/x
  3. Step 3: Cross multiply
    87,915,332x = 129,238,869 × 129,238,869
  4. Step 4: Simplify right side
    87,915,332x = 16,702,685,260,399,160
  5. Step 5: Solve for x
    x = 16,702,685,260,399,160/87,915,332
  6. Step 6: Final answer
    x = 189,986,034.07

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.