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Finding the Third Proportional to 63,278 and 129,715

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Solution

The third proportional to 63,278 and 129,715 is: 265,905.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,278 : 129,715 = 129,715 : x
  2. Step 2: Convert to fraction form
    63,278/129,715 = 129,715/x
  3. Step 3: Cross multiply
    63,278x = 129,715 × 129,715
  4. Step 4: Simplify right side
    63,278x = 16,825,981,225
  5. Step 5: Solve for x
    x = 16,825,981,225/63,278
  6. Step 6: Final answer
    x = 265,905.71

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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.