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Finding the Third Proportional to 87,915,330 and 129,238,866

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Solution

The third proportional to 87,915,330 and 129,238,866 is: 189,986,029.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,915,330 : 129,238,866 = 129,238,866 : x
  2. Step 2: Convert to fraction form
    87,915,330/129,238,866 = 129,238,866/x
  3. Step 3: Cross multiply
    87,915,330x = 129,238,866 × 129,238,866
  4. Step 4: Simplify right side
    87,915,330x = 16,702,684,484,965,956
  5. Step 5: Solve for x
    x = 16,702,684,484,965,956/87,915,330
  6. Step 6: Final answer
    x = 189,986,029.57

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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.