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Finding the Third Proportional to 81.84 and 117.28

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Solution

The third proportional to 81.84 and 117.28 is: 168.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.84 : 117.28 = 117.28 : x
  2. Step 2: Convert to fraction form
    81.84/117.28 = 117.28/x
  3. Step 3: Cross multiply
    81.84x = 117.28 × 117.28
  4. Step 4: Simplify right side
    81.84x = 13,754.89
  5. Step 5: Solve for x
    x = 13,754.89/81.84
  6. Step 6: Final answer
    x = 168.06

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.