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Finding the Third Proportional to 39 and 54.13

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Solution

The third proportional to 39 and 54.13 is: 75.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39 : 54.13 = 54.13 : x
  2. Step 2: Convert to fraction form
    39/54.13 = 54.13/x
  3. Step 3: Cross multiply
    39x = 54.13 × 54.13
  4. Step 4: Simplify right side
    39x = 2,929.52
  5. Step 5: Solve for x
    x = 2,929.52/39
  6. Step 6: Final answer
    x = 75.12

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.