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Finding the Fourth Proportional to 124.69, 187.07 and 42.43

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Solution

The fourth proportional to 124.69, 187.07 and 42.43 is: 63.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.69 : 187.07 = 42.43 : x
  2. Step 2: Convert to fraction form
    124.69/187.07 = 42.43/x
  3. Step 3: Cross multiply
    124.69x = 187.07 × 42.43
  4. Step 4: Simplify right side
    124.69x = 7,937.38
  5. Step 5: Solve for x
    x = 7,937.38/124.69
  6. Step 6: Final answer
    x = 63.66

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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.