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Finding the Fourth Proportional to 135.27, 203.92 and 111.38

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Solution

The fourth proportional to 135.27, 203.92 and 111.38 is: 167.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.27 : 203.92 = 111.38 : x
  2. Step 2: Convert to fraction form
    135.27/203.92 = 111.38/x
  3. Step 3: Cross multiply
    135.27x = 203.92 × 111.38
  4. Step 4: Simplify right side
    135.27x = 22,711.31
  5. Step 5: Solve for x
    x = 22,711.31/135.27
  6. Step 6: Final answer
    x = 167.90

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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.