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Finding the Third Proportional to 80 and 113.75

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Solution

The third proportional to 80 and 113.75 is: 161.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80 : 113.75 = 113.75 : x
  2. Step 2: Convert to fraction form
    80/113.75 = 113.75/x
  3. Step 3: Cross multiply
    80x = 113.75 × 113.75
  4. Step 4: Simplify right side
    80x = 12,939.06
  5. Step 5: Solve for x
    x = 12,939.06/80
  6. Step 6: Final answer
    x = 161.74

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.