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Finding the Fourth Proportional to 125.52, 187.20 and 113.28

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Solution

The fourth proportional to 125.52, 187.20 and 113.28 is: 168.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.52 : 187.20 = 113.28 : x
  2. Step 2: Convert to fraction form
    125.52/187.20 = 113.28/x
  3. Step 3: Cross multiply
    125.52x = 187.20 × 113.28
  4. Step 4: Simplify right side
    125.52x = 21,206.02
  5. Step 5: Solve for x
    x = 21,206.02/125.52
  6. Step 6: Final answer
    x = 168.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.