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Finding the Fourth Proportional to 168.10, 232.09 and 112.91

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Solution

The fourth proportional to 168.10, 232.09 and 112.91 is: 155.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.10 : 232.09 = 112.91 : x
  2. Step 2: Convert to fraction form
    168.10/232.09 = 112.91/x
  3. Step 3: Cross multiply
    168.10x = 232.09 × 112.91
  4. Step 4: Simplify right side
    168.10x = 26,205.28
  5. Step 5: Solve for x
    x = 26,205.28/168.10
  6. Step 6: Final answer
    x = 155.89

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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.