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Finding the Third Proportional to 47,940 and 71,760

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Solution

The third proportional to 47,940 and 71,760 is: 107,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,940 : 71,760 = 71,760 : x
  2. Step 2: Convert to fraction form
    47,940/71,760 = 71,760/x
  3. Step 3: Cross multiply
    47,940x = 71,760 × 71,760
  4. Step 4: Simplify right side
    47,940x = 5,149,497,600
  5. Step 5: Solve for x
    x = 5,149,497,600/47,940
  6. Step 6: Final answer
    x = 107,415.47

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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.