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Finding the Third Proportional to 100,878.75 and 221,349

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Solution

The third proportional to 100,878.75 and 221,349 is: 485,685.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,878.75 : 221,349 = 221,349 : x
  2. Step 2: Convert to fraction form
    100,878.75/221,349 = 221,349/x
  3. Step 3: Cross multiply
    100,878.75x = 221,349 × 221,349
  4. Step 4: Simplify right side
    100,878.75x = 48,995,379,801
  5. Step 5: Solve for x
    x = 48,995,379,801/100,878.75
  6. Step 6: Final answer
    x = 485,685.83

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.