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Finding the Fourth Proportional to 168.20, 251.01 and 147.96

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Solution

The fourth proportional to 168.20, 251.01 and 147.96 is: 220.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.20 : 251.01 = 147.96 : x
  2. Step 2: Convert to fraction form
    168.20/251.01 = 147.96/x
  3. Step 3: Cross multiply
    168.20x = 251.01 × 147.96
  4. Step 4: Simplify right side
    168.20x = 37,139.44
  5. Step 5: Solve for x
    x = 37,139.44/168.20
  6. Step 6: Final answer
    x = 220.81

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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.