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Finding the Third Proportional to 100,839 and 211,998

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Solution

The third proportional to 100,839 and 211,998 is: 445,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,839 : 211,998 = 211,998 : x
  2. Step 2: Convert to fraction form
    100,839/211,998 = 211,998/x
  3. Step 3: Cross multiply
    100,839x = 211,998 × 211,998
  4. Step 4: Simplify right side
    100,839x = 44,943,152,004
  5. Step 5: Solve for x
    x = 44,943,152,004/100,839
  6. Step 6: Final answer
    x = 445,692.16

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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.