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Finding the Fourth Proportional to 124.29, 171.68 and 113.56

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Solution

The fourth proportional to 124.29, 171.68 and 113.56 is: 156.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.29 : 171.68 = 113.56 : x
  2. Step 2: Convert to fraction form
    124.29/171.68 = 113.56/x
  3. Step 3: Cross multiply
    124.29x = 171.68 × 113.56
  4. Step 4: Simplify right side
    124.29x = 19,494.55
  5. Step 5: Solve for x
    x = 19,494.55/124.29
  6. Step 6: Final answer
    x = 156.85

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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.