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Finding the Third Proportional to 121,653.25 and 261,286.50

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Solution

The third proportional to 121,653.25 and 261,286.50 is: 561,190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,653.25 : 261,286.50 = 261,286.50 : x
  2. Step 2: Convert to fraction form
    121,653.25/261,286.50 = 261,286.50/x
  3. Step 3: Cross multiply
    121,653.25x = 261,286.50 × 261,286.50
  4. Step 4: Simplify right side
    121,653.25x = 68,270,635,082.25
  5. Step 5: Solve for x
    x = 68,270,635,082.25/121,653.25
  6. Step 6: Final answer
    x = 561,190.39

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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.