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Finding the Third Proportional to 39,787 and 85,999

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Solution

The third proportional to 39,787 and 85,999 is: 185,885.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,787 : 85,999 = 85,999 : x
  2. Step 2: Convert to fraction form
    39,787/85,999 = 85,999/x
  3. Step 3: Cross multiply
    39,787x = 85,999 × 85,999
  4. Step 4: Simplify right side
    39,787x = 7,395,828,001
  5. Step 5: Solve for x
    x = 7,395,828,001/39,787
  6. Step 6: Final answer
    x = 185,885.54

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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.