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Finding the Third Proportional to 19,921 and 41,750

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Solution

The third proportional to 19,921 and 41,750 is: 87,498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921 : 41,750 = 41,750 : x
  2. Step 2: Convert to fraction form
    19,921/41,750 = 41,750/x
  3. Step 3: Cross multiply
    19,921x = 41,750 × 41,750
  4. Step 4: Simplify right side
    19,921x = 1,743,062,500
  5. Step 5: Solve for x
    x = 1,743,062,500/19,921
  6. Step 6: Final answer
    x = 87,498.75

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.