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Finding the Fourth Proportional to 168.77, 254.42 and 157.62

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Solution

The fourth proportional to 168.77, 254.42 and 157.62 is: 237.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.77 : 254.42 = 157.62 : x
  2. Step 2: Convert to fraction form
    168.77/254.42 = 157.62/x
  3. Step 3: Cross multiply
    168.77x = 254.42 × 157.62
  4. Step 4: Simplify right side
    168.77x = 40,101.68
  5. Step 5: Solve for x
    x = 40,101.68/168.77
  6. Step 6: Final answer
    x = 237.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.