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Finding the Fourth Proportional to 168.87, 251.78 and 167.19

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Solution

The fourth proportional to 168.87, 251.78 and 167.19 is: 249.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.87 : 251.78 = 167.19 : x
  2. Step 2: Convert to fraction form
    168.87/251.78 = 167.19/x
  3. Step 3: Cross multiply
    168.87x = 251.78 × 167.19
  4. Step 4: Simplify right side
    168.87x = 42,095.10
  5. Step 5: Solve for x
    x = 42,095.10/168.87
  6. Step 6: Final answer
    x = 249.28

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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.