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Finding the Third Proportional to 53,867 and 81,638

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Solution

The third proportional to 53,867 and 81,638 is: 123,726.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,867 : 81,638 = 81,638 : x
  2. Step 2: Convert to fraction form
    53,867/81,638 = 81,638/x
  3. Step 3: Cross multiply
    53,867x = 81,638 × 81,638
  4. Step 4: Simplify right side
    53,867x = 6,664,763,044
  5. Step 5: Solve for x
    x = 6,664,763,044/53,867
  6. Step 6: Final answer
    x = 123,726.27

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.