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Finding the Third Proportional to 39,201.75 and 84,690

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Solution

The third proportional to 39,201.75 and 84,690 is: 182,961.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,201.75 : 84,690 = 84,690 : x
  2. Step 2: Convert to fraction form
    39,201.75/84,690 = 84,690/x
  3. Step 3: Cross multiply
    39,201.75x = 84,690 × 84,690
  4. Step 4: Simplify right side
    39,201.75x = 7,172,396,100
  5. Step 5: Solve for x
    x = 7,172,396,100/39,201.75
  6. Step 6: Final answer
    x = 182,961.12

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.