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Finding the Third Proportional to 39,782 and 87,340

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Solution

The third proportional to 39,782 and 87,340 is: 191,751.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782 : 87,340 = 87,340 : x
  2. Step 2: Convert to fraction form
    39,782/87,340 = 87,340/x
  3. Step 3: Cross multiply
    39,782x = 87,340 × 87,340
  4. Step 4: Simplify right side
    39,782x = 7,628,275,600
  5. Step 5: Solve for x
    x = 7,628,275,600/39,782
  6. Step 6: Final answer
    x = 191,751.94

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.