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Finding the Third Proportional to 39.88 and 87.38

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Solution

The third proportional to 39.88 and 87.38 is: 191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.88 : 87.38 = 87.38 : x
  2. Step 2: Convert to fraction form
    39.88/87.38 = 87.38/x
  3. Step 3: Cross multiply
    39.88x = 87.38 × 87.38
  4. Step 4: Simplify right side
    39.88x = 7,634.39
  5. Step 5: Solve for x
    x = 7,634.39/39.88
  6. Step 6: Final answer
    x = 191.46

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.