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Finding the Third Proportional to 54.11 and 77.87

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Solution

The third proportional to 54.11 and 77.87 is: 112.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.11 : 77.87 = 77.87 : x
  2. Step 2: Convert to fraction form
    54.11/77.87 = 77.87/x
  3. Step 3: Cross multiply
    54.11x = 77.87 × 77.87
  4. Step 4: Simplify right side
    54.11x = 6,063.05
  5. Step 5: Solve for x
    x = 6,063.05/54.11
  6. Step 6: Final answer
    x = 112.06

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.