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Finding the Third Proportional to 51,868 and 81,040

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Solution

The third proportional to 51,868 and 81,040 is: 126,619.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,868 : 81,040 = 81,040 : x
  2. Step 2: Convert to fraction form
    51,868/81,040 = 81,040/x
  3. Step 3: Cross multiply
    51,868x = 81,040 × 81,040
  4. Step 4: Simplify right side
    51,868x = 6,567,481,600
  5. Step 5: Solve for x
    x = 6,567,481,600/51,868
  6. Step 6: Final answer
    x = 126,619.14

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.