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Finding the Third Proportional to 129,708 and 265,851

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Solution

The third proportional to 129,708 and 265,851 is: 544,891.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,708 : 265,851 = 265,851 : x
  2. Step 2: Convert to fraction form
    129,708/265,851 = 265,851/x
  3. Step 3: Cross multiply
    129,708x = 265,851 × 265,851
  4. Step 4: Simplify right side
    129,708x = 70,676,754,201
  5. Step 5: Solve for x
    x = 70,676,754,201/129,708
  6. Step 6: Final answer
    x = 544,891.25

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.