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Finding the Fourth Proportional to 168.38, 251.93 and 131.69

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Solution

The fourth proportional to 168.38, 251.93 and 131.69 is: 197.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.38 : 251.93 = 131.69 : x
  2. Step 2: Convert to fraction form
    168.38/251.93 = 131.69/x
  3. Step 3: Cross multiply
    168.38x = 251.93 × 131.69
  4. Step 4: Simplify right side
    168.38x = 33,177.62
  5. Step 5: Solve for x
    x = 33,177.62/168.38
  6. Step 6: Final answer
    x = 197.05

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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.