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Finding the Third Proportional to 59,920 and 129,664

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Solution

The third proportional to 59,920 and 129,664 is: 280,586.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,920 : 129,664 = 129,664 : x
  2. Step 2: Convert to fraction form
    59,920/129,664 = 129,664/x
  3. Step 3: Cross multiply
    59,920x = 129,664 × 129,664
  4. Step 4: Simplify right side
    59,920x = 16,812,752,896
  5. Step 5: Solve for x
    x = 16,812,752,896/59,920
  6. Step 6: Final answer
    x = 280,586.66

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.