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Finding the Third Proportional to 54,438 and 81,657

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Solution

The third proportional to 54,438 and 81,657 is: 122,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,438 : 81,657 = 81,657 : x
  2. Step 2: Convert to fraction form
    54,438/81,657 = 81,657/x
  3. Step 3: Cross multiply
    54,438x = 81,657 × 81,657
  4. Step 4: Simplify right side
    54,438x = 6,667,865,649
  5. Step 5: Solve for x
    x = 6,667,865,649/54,438
  6. Step 6: Final answer
    x = 122,485.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.