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Finding the Fourth Proportional to 124.72, 187.12 and 52.58

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Solution

The fourth proportional to 124.72, 187.12 and 52.58 is: 78.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.72 : 187.12 = 52.58 : x
  2. Step 2: Convert to fraction form
    124.72/187.12 = 52.58/x
  3. Step 3: Cross multiply
    124.72x = 187.12 × 52.58
  4. Step 4: Simplify right side
    124.72x = 9,838.77
  5. Step 5: Solve for x
    x = 9,838.77/124.72
  6. Step 6: Final answer
    x = 78.89

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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.