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Finding the Third Proportional to 78,765 and 126,349

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Solution

The third proportional to 78,765 and 126,349 is: 202,679.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,765 : 126,349 = 126,349 : x
  2. Step 2: Convert to fraction form
    78,765/126,349 = 126,349/x
  3. Step 3: Cross multiply
    78,765x = 126,349 × 126,349
  4. Step 4: Simplify right side
    78,765x = 15,964,069,801
  5. Step 5: Solve for x
    x = 15,964,069,801/78,765
  6. Step 6: Final answer
    x = 202,679.74

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.