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Finding the Third Proportional to 50,678 and 78,663

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Solution

The third proportional to 50,678 and 78,663 is: 122,101.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,678 : 78,663 = 78,663 : x
  2. Step 2: Convert to fraction form
    50,678/78,663 = 78,663/x
  3. Step 3: Cross multiply
    50,678x = 78,663 × 78,663
  4. Step 4: Simplify right side
    50,678x = 6,187,867,569
  5. Step 5: Solve for x
    x = 6,187,867,569/50,678
  6. Step 6: Final answer
    x = 122,101.65

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.