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Finding the Third Proportional to 121,616 and 261,214

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Solution

The third proportional to 121,616 and 261,214 is: 561,050.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,616 : 261,214 = 261,214 : x
  2. Step 2: Convert to fraction form
    121,616/261,214 = 261,214/x
  3. Step 3: Cross multiply
    121,616x = 261,214 × 261,214
  4. Step 4: Simplify right side
    121,616x = 68,232,753,796
  5. Step 5: Solve for x
    x = 68,232,753,796/121,616
  6. Step 6: Final answer
    x = 561,050.80

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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.