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Finding the Third Proportional to 129,787 and 269,905

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Solution

The third proportional to 129,787 and 269,905 is: 561,294.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,787 : 269,905 = 269,905 : x
  2. Step 2: Convert to fraction form
    129,787/269,905 = 269,905/x
  3. Step 3: Cross multiply
    129,787x = 269,905 × 269,905
  4. Step 4: Simplify right side
    129,787x = 72,848,709,025
  5. Step 5: Solve for x
    x = 72,848,709,025/129,787
  6. Step 6: Final answer
    x = 561,294.34

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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.