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Finding the Third Proportional to 39.38 and 82.13

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Solution

The third proportional to 39.38 and 82.13 is: 171.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.38 : 82.13 = 82.13 : x
  2. Step 2: Convert to fraction form
    39.38/82.13 = 82.13/x
  3. Step 3: Cross multiply
    39.38x = 82.13 × 82.13
  4. Step 4: Simplify right side
    39.38x = 6,744.52
  5. Step 5: Solve for x
    x = 6,744.52/39.38
  6. Step 6: Final answer
    x = 171.29

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.