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Finding the Fourth Proportional to 124.67, 186.88 and 42.38

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Solution

The fourth proportional to 124.67, 186.88 and 42.38 is: 63.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.67 : 186.88 = 42.38 : x
  2. Step 2: Convert to fraction form
    124.67/186.88 = 42.38/x
  3. Step 3: Cross multiply
    124.67x = 186.88 × 42.38
  4. Step 4: Simplify right side
    124.67x = 7,919.63
  5. Step 5: Solve for x
    x = 7,919.63/124.67
  6. Step 6: Final answer
    x = 63.52

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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.