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Finding the Third Proportional to 81,271 and 107,838

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Solution

The third proportional to 81,271 and 107,838 is: 143,089.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,271 : 107,838 = 107,838 : x
  2. Step 2: Convert to fraction form
    81,271/107,838 = 107,838/x
  3. Step 3: Cross multiply
    81,271x = 107,838 × 107,838
  4. Step 4: Simplify right side
    81,271x = 11,629,034,244
  5. Step 5: Solve for x
    x = 11,629,034,244/81,271
  6. Step 6: Final answer
    x = 143,089.59

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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.