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Finding the Third Proportional to 39,757 and 86,987

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Solution

The third proportional to 39,757 and 86,987 is: 190,324.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,757 : 86,987 = 86,987 : x
  2. Step 2: Convert to fraction form
    39,757/86,987 = 86,987/x
  3. Step 3: Cross multiply
    39,757x = 86,987 × 86,987
  4. Step 4: Simplify right side
    39,757x = 7,566,738,169
  5. Step 5: Solve for x
    x = 7,566,738,169/39,757
  6. Step 6: Final answer
    x = 190,324.68

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.