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Finding the Third Proportional to 39,831 and 54,127

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Solution

The third proportional to 39,831 and 54,127 is: 73,554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,831 : 54,127 = 54,127 : x
  2. Step 2: Convert to fraction form
    39,831/54,127 = 54,127/x
  3. Step 3: Cross multiply
    39,831x = 54,127 × 54,127
  4. Step 4: Simplify right side
    39,831x = 2,929,732,129
  5. Step 5: Solve for x
    x = 2,929,732,129/39,831
  6. Step 6: Final answer
    x = 73,554.07

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.