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Finding the Third Proportional to 129 and 166.13

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Solution

The third proportional to 129 and 166.13 is: 213.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129 : 166.13 = 166.13 : x
  2. Step 2: Convert to fraction form
    129/166.13 = 166.13/x
  3. Step 3: Cross multiply
    129x = 166.13 × 166.13
  4. Step 4: Simplify right side
    129x = 27,597.52
  5. Step 5: Solve for x
    x = 27,597.52/129
  6. Step 6: Final answer
    x = 213.93

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.