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Finding the Fourth Proportional to 129.73, 193.49 and 125.88

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Solution

The fourth proportional to 129.73, 193.49 and 125.88 is: 187.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.73 : 193.49 = 125.88 : x
  2. Step 2: Convert to fraction form
    129.73/193.49 = 125.88/x
  3. Step 3: Cross multiply
    129.73x = 193.49 × 125.88
  4. Step 4: Simplify right side
    129.73x = 24,356.52
  5. Step 5: Solve for x
    x = 24,356.52/129.73
  6. Step 6: Final answer
    x = 187.75

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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.