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Finding the Third Proportional to 99,879 and 214,446

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Solution

The third proportional to 99,879 and 214,446 is: 460,427.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,879 : 214,446 = 214,446 : x
  2. Step 2: Convert to fraction form
    99,879/214,446 = 214,446/x
  3. Step 3: Cross multiply
    99,879x = 214,446 × 214,446
  4. Step 4: Simplify right side
    99,879x = 45,987,086,916
  5. Step 5: Solve for x
    x = 45,987,086,916/99,879
  6. Step 6: Final answer
    x = 460,427.99

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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.