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Finding the Fourth Proportional to 67.97, 102.14 and 39.13

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Solution

The fourth proportional to 67.97, 102.14 and 39.13 is: 58.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.97 : 102.14 = 39.13 : x
  2. Step 2: Convert to fraction form
    67.97/102.14 = 39.13/x
  3. Step 3: Cross multiply
    67.97x = 102.14 × 39.13
  4. Step 4: Simplify right side
    67.97x = 3,996.74
  5. Step 5: Solve for x
    x = 3,996.74/67.97
  6. Step 6: Final answer
    x = 58.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.