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Finding the Third Proportional to 74.69 and 112.97

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Solution

The third proportional to 74.69 and 112.97 is: 170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.69 : 112.97 = 112.97 : x
  2. Step 2: Convert to fraction form
    74.69/112.97 = 112.97/x
  3. Step 3: Cross multiply
    74.69x = 112.97 × 112.97
  4. Step 4: Simplify right side
    74.69x = 12,761.94
  5. Step 5: Solve for x
    x = 12,761.94/74.69
  6. Step 6: Final answer
    x = 170.87

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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.