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Finding the Third Proportional to 81,492 and 129,663

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Solution

The third proportional to 81,492 and 129,663 is: 206,308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,492 : 129,663 = 129,663 : x
  2. Step 2: Convert to fraction form
    81,492/129,663 = 129,663/x
  3. Step 3: Cross multiply
    81,492x = 129,663 × 129,663
  4. Step 4: Simplify right side
    81,492x = 16,812,493,569
  5. Step 5: Solve for x
    x = 16,812,493,569/81,492
  6. Step 6: Final answer
    x = 206,308.52

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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.