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Finding the Fourth Proportional to 62.43, 86.17 and 39.13

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Solution

The fourth proportional to 62.43, 86.17 and 39.13 is: 54.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.43 : 86.17 = 39.13 : x
  2. Step 2: Convert to fraction form
    62.43/86.17 = 39.13/x
  3. Step 3: Cross multiply
    62.43x = 86.17 × 39.13
  4. Step 4: Simplify right side
    62.43x = 3,371.83
  5. Step 5: Solve for x
    x = 3,371.83/62.43
  6. Step 6: Final answer
    x = 54.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.