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Finding the Third Proportional to 55 and 80.88

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Solution

The third proportional to 55 and 80.88 is: 118.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    55 : 80.88 = 80.88 : x
  2. Step 2: Convert to fraction form
    55/80.88 = 80.88/x
  3. Step 3: Cross multiply
    55x = 80.88 × 80.88
  4. Step 4: Simplify right side
    55x = 6,540.77
  5. Step 5: Solve for x
    x = 6,540.77/55
  6. Step 6: Final answer
    x = 118.92

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.