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Finding the Third Proportional to 75 and 87.25

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Solution

The third proportional to 75 and 87.25 is: 101.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    75 : 87.25 = 87.25 : x
  2. Step 2: Convert to fraction form
    75/87.25 = 87.25/x
  3. Step 3: Cross multiply
    75x = 87.25 × 87.25
  4. Step 4: Simplify right side
    75x = 7,612.56
  5. Step 5: Solve for x
    x = 7,612.56/75
  6. Step 6: Final answer
    x = 101.50

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.