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Finding the Third Proportional to 40,920 and 61,422

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Solution

The third proportional to 40,920 and 61,422 is: 92,196.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,920 : 61,422 = 61,422 : x
  2. Step 2: Convert to fraction form
    40,920/61,422 = 61,422/x
  3. Step 3: Cross multiply
    40,920x = 61,422 × 61,422
  4. Step 4: Simplify right side
    40,920x = 3,772,662,084
  5. Step 5: Solve for x
    x = 3,772,662,084/40,920
  6. Step 6: Final answer
    x = 92,196.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.