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Finding the Fourth Proportional to 125.53, 187.92 and 74.03

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Solution

The fourth proportional to 125.53, 187.92 and 74.03 is: 110.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.53 : 187.92 = 74.03 : x
  2. Step 2: Convert to fraction form
    125.53/187.92 = 74.03/x
  3. Step 3: Cross multiply
    125.53x = 187.92 × 74.03
  4. Step 4: Simplify right side
    125.53x = 13,910.78
  5. Step 5: Solve for x
    x = 13,910.78/125.53
  6. Step 6: Final answer
    x = 110.82

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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.