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Finding the Third Proportional to 39,789 and 85,041

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Solution

The third proportional to 39,789 and 85,041 is: 181,758.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789 : 85,041 = 85,041 : x
  2. Step 2: Convert to fraction form
    39,789/85,041 = 85,041/x
  3. Step 3: Cross multiply
    39,789x = 85,041 × 85,041
  4. Step 4: Simplify right side
    39,789x = 7,231,971,681
  5. Step 5: Solve for x
    x = 7,231,971,681/39,789
  6. Step 6: Final answer
    x = 181,758.07

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.