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Finding the Third Proportional to 81,381 and 110,859

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Solution

The third proportional to 81,381 and 110,859 is: 151,014.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381 : 110,859 = 110,859 : x
  2. Step 2: Convert to fraction form
    81,381/110,859 = 110,859/x
  3. Step 3: Cross multiply
    81,381x = 110,859 × 110,859
  4. Step 4: Simplify right side
    81,381x = 12,289,717,881
  5. Step 5: Solve for x
    x = 12,289,717,881/81,381
  6. Step 6: Final answer
    x = 151,014.58

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.