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Finding the Third Proportional to 71,438 and 107,805

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Solution

The third proportional to 71,438 and 107,805 is: 162,685.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,438 : 107,805 = 107,805 : x
  2. Step 2: Convert to fraction form
    71,438/107,805 = 107,805/x
  3. Step 3: Cross multiply
    71,438x = 107,805 × 107,805
  4. Step 4: Simplify right side
    71,438x = 11,621,918,025
  5. Step 5: Solve for x
    x = 11,621,918,025/71,438
  6. Step 6: Final answer
    x = 162,685.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.