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Finding the Third Proportional to 129,868 and 269,720

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Solution

The third proportional to 129,868 and 269,720 is: 560,175.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,868 : 269,720 = 269,720 : x
  2. Step 2: Convert to fraction form
    129,868/269,720 = 269,720/x
  3. Step 3: Cross multiply
    129,868x = 269,720 × 269,720
  4. Step 4: Simplify right side
    129,868x = 72,748,878,400
  5. Step 5: Solve for x
    x = 72,748,878,400/129,868
  6. Step 6: Final answer
    x = 560,175.55

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.