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Finding the Third Proportional to 81.94 and 108.28

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Solution

The third proportional to 81.94 and 108.28 is: 143.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.94 : 108.28 = 108.28 : x
  2. Step 2: Convert to fraction form
    81.94/108.28 = 108.28/x
  3. Step 3: Cross multiply
    81.94x = 108.28 × 108.28
  4. Step 4: Simplify right side
    81.94x = 11,724.83
  5. Step 5: Solve for x
    x = 11,724.83/81.94
  6. Step 6: Final answer
    x = 143.09

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.