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Finding the Third Proportional to 39,110 and 51,861

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Solution

The third proportional to 39,110 and 51,861 is: 68,769.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,110 : 51,861 = 51,861 : x
  2. Step 2: Convert to fraction form
    39,110/51,861 = 51,861/x
  3. Step 3: Cross multiply
    39,110x = 51,861 × 51,861
  4. Step 4: Simplify right side
    39,110x = 2,689,563,321
  5. Step 5: Solve for x
    x = 2,689,563,321/39,110
  6. Step 6: Final answer
    x = 68,769.20

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.