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Finding the Third Proportional to 60.39 and 129.88

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Solution

The third proportional to 60.39 and 129.88 is: 279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.39 : 129.88 = 129.88 : x
  2. Step 2: Convert to fraction form
    60.39/129.88 = 129.88/x
  3. Step 3: Cross multiply
    60.39x = 129.88 × 129.88
  4. Step 4: Simplify right side
    60.39x = 16,868.53
  5. Step 5: Solve for x
    x = 16,868.53/60.39
  6. Step 6: Final answer
    x = 279.34

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.