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Finding the Fourth Proportional to 168.11, 231.96 and 98.18

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Solution

The fourth proportional to 168.11, 231.96 and 98.18 is: 135.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.11 : 231.96 = 98.18 : x
  2. Step 2: Convert to fraction form
    168.11/231.96 = 98.18/x
  3. Step 3: Cross multiply
    168.11x = 231.96 × 98.18
  4. Step 4: Simplify right side
    168.11x = 22,772.67
  5. Step 5: Solve for x
    x = 22,772.67/168.11
  6. Step 6: Final answer
    x = 135.47

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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.