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Finding the Third Proportional to 20,920 and 45,125

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Solution

The third proportional to 20,920 and 45,125 is: 97,335.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920 : 45,125 = 45,125 : x
  2. Step 2: Convert to fraction form
    20,920/45,125 = 45,125/x
  3. Step 3: Cross multiply
    20,920x = 45,125 × 45,125
  4. Step 4: Simplify right side
    20,920x = 2,036,265,625
  5. Step 5: Solve for x
    x = 2,036,265,625/20,920
  6. Step 6: Final answer
    x = 97,335.83

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.