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Finding the Fourth Proportional to 218,138.39, 327,382.56 and 112,987.43

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Solution

The fourth proportional to 218,138.39, 327,382.56 and 112,987.43 is: 169,571.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,138.39 : 327,382.56 = 112,987.43 : x
  2. Step 2: Convert to fraction form
    218,138.39/327,382.56 = 112,987.43/x
  3. Step 3: Cross multiply
    218,138.39x = 327,382.56 × 112,987.43
  4. Step 4: Simplify right side
    218,138.39x = 36,990,112,444.31
  5. Step 5: Solve for x
    x = 36,990,112,444.31/218,138.39
  6. Step 6: Final answer
    x = 169,571.77

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1.5x scale

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.