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Finding the Third Proportional to 99,876 and 220,620

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Solution

The third proportional to 99,876 and 220,620 is: 487,336.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,876 : 220,620 = 220,620 : x
  2. Step 2: Convert to fraction form
    99,876/220,620 = 220,620/x
  3. Step 3: Cross multiply
    99,876x = 220,620 × 220,620
  4. Step 4: Simplify right side
    99,876x = 48,673,184,400
  5. Step 5: Solve for x
    x = 48,673,184,400/99,876
  6. Step 6: Final answer
    x = 487,336.14

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.