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Finding the Fourth Proportional to 168.12, 232.20 and 124.56

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Solution

The fourth proportional to 168.12, 232.20 and 124.56 is: 172.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.12 : 232.20 = 124.56 : x
  2. Step 2: Convert to fraction form
    168.12/232.20 = 124.56/x
  3. Step 3: Cross multiply
    168.12x = 232.20 × 124.56
  4. Step 4: Simplify right side
    168.12x = 28,922.83
  5. Step 5: Solve for x
    x = 28,922.83/168.12
  6. Step 6: Final answer
    x = 172.04

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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.