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Finding the Third Proportional to 55.50 and 80.63

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Solution

The third proportional to 55.50 and 80.63 is: 117.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.50 : 80.63 = 80.63 : x
  2. Step 2: Convert to fraction form
    55.50/80.63 = 80.63/x
  3. Step 3: Cross multiply
    55.50x = 80.63 × 80.63
  4. Step 4: Simplify right side
    55.50x = 6,500.39
  5. Step 5: Solve for x
    x = 6,500.39/55.50
  6. Step 6: Final answer
    x = 117.12

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.