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Finding the Fourth Proportional to 169.92, 234.20 and 134.79

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Solution

The fourth proportional to 169.92, 234.20 and 134.79 is: 185.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.92 : 234.20 = 134.79 : x
  2. Step 2: Convert to fraction form
    169.92/234.20 = 134.79/x
  3. Step 3: Cross multiply
    169.92x = 234.20 × 134.79
  4. Step 4: Simplify right side
    169.92x = 31,568.15
  5. Step 5: Solve for x
    x = 31,568.15/169.92
  6. Step 6: Final answer
    x = 185.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.