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Finding the Third Proportional to 57.19 and 88.78

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Solution

The third proportional to 57.19 and 88.78 is: 137.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.19 : 88.78 = 88.78 : x
  2. Step 2: Convert to fraction form
    57.19/88.78 = 88.78/x
  3. Step 3: Cross multiply
    57.19x = 88.78 × 88.78
  4. Step 4: Simplify right side
    57.19x = 7,882.11
  5. Step 5: Solve for x
    x = 7,882.11/57.19
  6. Step 6: Final answer
    x = 137.83

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.