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Finding the Third Proportional to 80.16 and 108.84

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Solution

The third proportional to 80.16 and 108.84 is: 147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.16 : 108.84 = 108.84 : x
  2. Step 2: Convert to fraction form
    80.16/108.84 = 108.84/x
  3. Step 3: Cross multiply
    80.16x = 108.84 × 108.84
  4. Step 4: Simplify right side
    80.16x = 11,846.96
  5. Step 5: Solve for x
    x = 11,846.96/80.16
  6. Step 6: Final answer
    x = 147.80

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.