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Finding the Fourth Proportional to 169.52, 234.16 and 134.78

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Solution

The fourth proportional to 169.52, 234.16 and 134.78 is: 186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.52 : 234.16 = 134.78 : x
  2. Step 2: Convert to fraction form
    169.52/234.16 = 134.78/x
  3. Step 3: Cross multiply
    169.52x = 234.16 × 134.78
  4. Step 4: Simplify right side
    169.52x = 31,560.08
  5. Step 5: Solve for x
    x = 31,560.08/169.52
  6. Step 6: Final answer
    x = 186.17

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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.