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Finding the Third Proportional to 39,719 and 82,705

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Solution

The third proportional to 39,719 and 82,705 is: 172,212.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719 : 82,705 = 82,705 : x
  2. Step 2: Convert to fraction form
    39,719/82,705 = 82,705/x
  3. Step 3: Cross multiply
    39,719x = 82,705 × 82,705
  4. Step 4: Simplify right side
    39,719x = 6,840,117,025
  5. Step 5: Solve for x
    x = 6,840,117,025/39,719
  6. Step 6: Final answer
    x = 172,212.72

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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.