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Finding the Fourth Proportional to 153.38, 231.11 and 126.92

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Solution

The fourth proportional to 153.38, 231.11 and 126.92 is: 191.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.38 : 231.11 = 126.92 : x
  2. Step 2: Convert to fraction form
    153.38/231.11 = 126.92/x
  3. Step 3: Cross multiply
    153.38x = 231.11 × 126.92
  4. Step 4: Simplify right side
    153.38x = 29,332.48
  5. Step 5: Solve for x
    x = 29,332.48/153.38
  6. Step 6: Final answer
    x = 191.24

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.