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Finding the Fourth Proportional to 324,112.11, 486,168.15 and 87,454.78

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Solution

The fourth proportional to 324,112.11, 486,168.15 and 87,454.78 is: 131,182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,112.11 : 486,168.15 = 87,454.78 : x
  2. Step 2: Convert to fraction form
    324,112.11/486,168.15 = 87,454.78/x
  3. Step 3: Cross multiply
    324,112.11x = 486,168.15 × 87,454.78
  4. Step 4: Simplify right side
    324,112.11x = 42,517,728,601.26
  5. Step 5: Solve for x
    x = 42,517,728,601.26/324,112.11
  6. Step 6: Final answer
    x = 131,182.17

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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.