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Finding the Third Proportional to 81,344 and 129,882

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Solution

The third proportional to 81,344 and 129,882 is: 207,382.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,344 : 129,882 = 129,882 : x
  2. Step 2: Convert to fraction form
    81,344/129,882 = 129,882/x
  3. Step 3: Cross multiply
    81,344x = 129,882 × 129,882
  4. Step 4: Simplify right side
    81,344x = 16,869,333,924
  5. Step 5: Solve for x
    x = 16,869,333,924/81,344
  6. Step 6: Final answer
    x = 207,382.65

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.