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Finding the Fourth Proportional to 247,932, 371,956.32 and 81,720

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Solution

The fourth proportional to 247,932, 371,956.32 and 81,720 is: 122,599.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,932 : 371,956.32 = 81,720 : x
  2. Step 2: Convert to fraction form
    247,932/371,956.32 = 81,720/x
  3. Step 3: Cross multiply
    247,932x = 371,956.32 × 81,720
  4. Step 4: Simplify right side
    247,932x = 30,396,270,470.40
  5. Step 5: Solve for x
    x = 30,396,270,470.40/247,932
  6. Step 6: Final answer
    x = 122,599.22

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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.