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Finding the Third Proportional to 39,739 and 55,697

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Solution

The third proportional to 39,739 and 55,697 is: 78,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,739 : 55,697 = 55,697 : x
  2. Step 2: Convert to fraction form
    39,739/55,697 = 55,697/x
  3. Step 3: Cross multiply
    39,739x = 55,697 × 55,697
  4. Step 4: Simplify right side
    39,739x = 3,102,155,809
  5. Step 5: Solve for x
    x = 3,102,155,809/39,739
  6. Step 6: Final answer
    x = 78,063.26

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.