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Finding the Third Proportional to 38,520 and 82,790

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Solution

The third proportional to 38,520 and 82,790 is: 177,938.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,520 : 82,790 = 82,790 : x
  2. Step 2: Convert to fraction form
    38,520/82,790 = 82,790/x
  3. Step 3: Cross multiply
    38,520x = 82,790 × 82,790
  4. Step 4: Simplify right side
    38,520x = 6,854,184,100
  5. Step 5: Solve for x
    x = 6,854,184,100/38,520
  6. Step 6: Final answer
    x = 177,938.32

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.