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Finding the Third Proportional to 128,756 and 192,387

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Solution

The third proportional to 128,756 and 192,387 is: 287,464.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,756 : 192,387 = 192,387 : x
  2. Step 2: Convert to fraction form
    128,756/192,387 = 192,387/x
  3. Step 3: Cross multiply
    128,756x = 192,387 × 192,387
  4. Step 4: Simplify right side
    128,756x = 37,012,757,769
  5. Step 5: Solve for x
    x = 37,012,757,769/128,756
  6. Step 6: Final answer
    x = 287,464.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.