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Finding the Fourth Proportional to 124.97, 187.45 and 39.47

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Solution

The fourth proportional to 124.97, 187.45 and 39.47 is: 59.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.97 : 187.45 = 39.47 : x
  2. Step 2: Convert to fraction form
    124.97/187.45 = 39.47/x
  3. Step 3: Cross multiply
    124.97x = 187.45 × 39.47
  4. Step 4: Simplify right side
    124.97x = 7,398.65
  5. Step 5: Solve for x
    x = 7,398.65/124.97
  6. Step 6: Final answer
    x = 59.20

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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.