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Finding the Third Proportional to 42,660 and 91,638

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Solution

The third proportional to 42,660 and 91,638 is: 196,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,660 : 91,638 = 91,638 : x
  2. Step 2: Convert to fraction form
    42,660/91,638 = 91,638/x
  3. Step 3: Cross multiply
    42,660x = 91,638 × 91,638
  4. Step 4: Simplify right side
    42,660x = 8,397,523,044
  5. Step 5: Solve for x
    x = 8,397,523,044/42,660
  6. Step 6: Final answer
    x = 196,847.70

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.