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Finding the Third Proportional to 47,979 and 76,653

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Solution

The third proportional to 47,979 and 76,653 is: 122,463.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,979 : 76,653 = 76,653 : x
  2. Step 2: Convert to fraction form
    47,979/76,653 = 76,653/x
  3. Step 3: Cross multiply
    47,979x = 76,653 × 76,653
  4. Step 4: Simplify right side
    47,979x = 5,875,682,409
  5. Step 5: Solve for x
    x = 5,875,682,409/47,979
  6. Step 6: Final answer
    x = 122,463.63

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.