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Finding the Third Proportional to 81,262 and 129,766

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Solution

The third proportional to 81,262 and 129,766 is: 207,221.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262 : 129,766 = 129,766 : x
  2. Step 2: Convert to fraction form
    81,262/129,766 = 129,766/x
  3. Step 3: Cross multiply
    81,262x = 129,766 × 129,766
  4. Step 4: Simplify right side
    81,262x = 16,839,214,756
  5. Step 5: Solve for x
    x = 16,839,214,756/81,262
  6. Step 6: Final answer
    x = 207,221.27

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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.