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Finding the Third Proportional to 21,755 and 41,781

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Solution

The third proportional to 21,755 and 41,781 is: 80,241.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,755 : 41,781 = 41,781 : x
  2. Step 2: Convert to fraction form
    21,755/41,781 = 41,781/x
  3. Step 3: Cross multiply
    21,755x = 41,781 × 41,781
  4. Step 4: Simplify right side
    21,755x = 1,745,651,961
  5. Step 5: Solve for x
    x = 1,745,651,961/21,755
  6. Step 6: Final answer
    x = 80,241.41

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Why These Related Problems?

These problems maintain the same ratio (1.92) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.