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Finding the Third Proportional to 99,839 and 218,100

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Solution

The third proportional to 99,839 and 218,100 is: 476,443.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,839 : 218,100 = 218,100 : x
  2. Step 2: Convert to fraction form
    99,839/218,100 = 218,100/x
  3. Step 3: Cross multiply
    99,839x = 218,100 × 218,100
  4. Step 4: Simplify right side
    99,839x = 47,567,610,000
  5. Step 5: Solve for x
    x = 47,567,610,000/99,839
  6. Step 6: Final answer
    x = 476,443.17

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.