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Finding the Fourth Proportional to 124.57, 170.72 and 122.96

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Solution

The fourth proportional to 124.57, 170.72 and 122.96 is: 168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.57 : 170.72 = 122.96 : x
  2. Step 2: Convert to fraction form
    124.57/170.72 = 122.96/x
  3. Step 3: Cross multiply
    124.57x = 170.72 × 122.96
  4. Step 4: Simplify right side
    124.57x = 20,991.73
  5. Step 5: Solve for x
    x = 20,991.73/124.57
  6. Step 6: Final answer
    x = 168.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.