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Finding the Fourth Proportional to 168.87, 252.19 and 136.41

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Solution

The fourth proportional to 168.87, 252.19 and 136.41 is: 203.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.87 : 252.19 = 136.41 : x
  2. Step 2: Convert to fraction form
    168.87/252.19 = 136.41/x
  3. Step 3: Cross multiply
    168.87x = 252.19 × 136.41
  4. Step 4: Simplify right side
    168.87x = 34,400.90
  5. Step 5: Solve for x
    x = 34,400.90/168.87
  6. Step 6: Final answer
    x = 203.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.