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Finding the Fourth Proportional to 168.11, 231.99 and 101.71

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Solution

The fourth proportional to 168.11, 231.99 and 101.71 is: 140.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.11 : 231.99 = 101.71 : x
  2. Step 2: Convert to fraction form
    168.11/231.99 = 101.71/x
  3. Step 3: Cross multiply
    168.11x = 231.99 × 101.71
  4. Step 4: Simplify right side
    168.11x = 23,595.70
  5. Step 5: Solve for x
    x = 23,595.70/168.11
  6. Step 6: Final answer
    x = 140.36

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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.