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Finding the Third Proportional to 81,542 and 129,725

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Solution

The third proportional to 81,542 and 129,725 is: 206,379.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,542 : 129,725 = 129,725 : x
  2. Step 2: Convert to fraction form
    81,542/129,725 = 129,725/x
  3. Step 3: Cross multiply
    81,542x = 129,725 × 129,725
  4. Step 4: Simplify right side
    81,542x = 16,828,575,625
  5. Step 5: Solve for x
    x = 16,828,575,625/81,542
  6. Step 6: Final answer
    x = 206,379.24

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.