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Finding the Third Proportional to 77.84 and 116.28

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Solution

The third proportional to 77.84 and 116.28 is: 173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.84 : 116.28 = 116.28 : x
  2. Step 2: Convert to fraction form
    77.84/116.28 = 116.28/x
  3. Step 3: Cross multiply
    77.84x = 116.28 × 116.28
  4. Step 4: Simplify right side
    77.84x = 13,520.87
  5. Step 5: Solve for x
    x = 13,520.87/77.84
  6. Step 6: Final answer
    x = 173.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.