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Finding the Third Proportional to 57,638 and 87,641

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Solution

The third proportional to 57,638 and 87,641 is: 133,261.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,638 : 87,641 = 87,641 : x
  2. Step 2: Convert to fraction form
    57,638/87,641 = 87,641/x
  3. Step 3: Cross multiply
    57,638x = 87,641 × 87,641
  4. Step 4: Simplify right side
    57,638x = 7,680,944,881
  5. Step 5: Solve for x
    x = 7,680,944,881/57,638
  6. Step 6: Final answer
    x = 133,261.82

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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.