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Finding the Third Proportional to 56,438 and 84,381

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Solution

The third proportional to 56,438 and 84,381 is: 126,158.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,438 : 84,381 = 84,381 : x
  2. Step 2: Convert to fraction form
    56,438/84,381 = 84,381/x
  3. Step 3: Cross multiply
    56,438x = 84,381 × 84,381
  4. Step 4: Simplify right side
    56,438x = 7,120,153,161
  5. Step 5: Solve for x
    x = 7,120,153,161/56,438
  6. Step 6: Final answer
    x = 126,158.85

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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.