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Finding the Third Proportional to 83.53 and 122.20

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Solution

The third proportional to 83.53 and 122.20 is: 178.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.53 : 122.20 = 122.20 : x
  2. Step 2: Convert to fraction form
    83.53/122.20 = 122.20/x
  3. Step 3: Cross multiply
    83.53x = 122.20 × 122.20
  4. Step 4: Simplify right side
    83.53x = 14,933.60
  5. Step 5: Solve for x
    x = 14,933.60/83.53
  6. Step 6: Final answer
    x = 178.78

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.