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Finding the Fourth Proportional to 112.38, 168.11 and 76.23

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Solution

The fourth proportional to 112.38, 168.11 and 76.23 is: 114.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.38 : 168.11 = 76.23 : x
  2. Step 2: Convert to fraction form
    112.38/168.11 = 76.23/x
  3. Step 3: Cross multiply
    112.38x = 168.11 × 76.23
  4. Step 4: Simplify right side
    112.38x = 12,814.93
  5. Step 5: Solve for x
    x = 12,814.93/112.38
  6. Step 6: Final answer
    x = 114.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.