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Finding the Third Proportional to 39,517 and 86,647

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Solution

The third proportional to 39,517 and 86,647 is: 189,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,517 : 86,647 = 86,647 : x
  2. Step 2: Convert to fraction form
    39,517/86,647 = 86,647/x
  3. Step 3: Cross multiply
    39,517x = 86,647 × 86,647
  4. Step 4: Simplify right side
    39,517x = 7,507,702,609
  5. Step 5: Solve for x
    x = 7,507,702,609/39,517
  6. Step 6: Final answer
    x = 189,986.65

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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.