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Finding the Third Proportional to 86,460 and 129,691

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Solution

The third proportional to 86,460 and 129,691 is: 194,538.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,460 : 129,691 = 129,691 : x
  2. Step 2: Convert to fraction form
    86,460/129,691 = 129,691/x
  3. Step 3: Cross multiply
    86,460x = 129,691 × 129,691
  4. Step 4: Simplify right side
    86,460x = 16,819,755,481
  5. Step 5: Solve for x
    x = 16,819,755,481/86,460
  6. Step 6: Final answer
    x = 194,538.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.