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Finding the Third Proportional to 39,939 and 64,344

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Solution

The third proportional to 39,939 and 64,344 is: 103,661.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,939 : 64,344 = 64,344 : x
  2. Step 2: Convert to fraction form
    39,939/64,344 = 64,344/x
  3. Step 3: Cross multiply
    39,939x = 64,344 × 64,344
  4. Step 4: Simplify right side
    39,939x = 4,140,150,336
  5. Step 5: Solve for x
    x = 4,140,150,336/39,939
  6. Step 6: Final answer
    x = 103,661.84

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.