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Finding the Third Proportional to 79.31 and 124.88

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Solution

The third proportional to 79.31 and 124.88 is: 196.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.31 : 124.88 = 124.88 : x
  2. Step 2: Convert to fraction form
    79.31/124.88 = 124.88/x
  3. Step 3: Cross multiply
    79.31x = 124.88 × 124.88
  4. Step 4: Simplify right side
    79.31x = 15,593.77
  5. Step 5: Solve for x
    x = 15,593.77/79.31
  6. Step 6: Final answer
    x = 196.61

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.