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Finding the Fourth Proportional to 72,785.52, 109,180.08 and 20,194.92

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Solution

The fourth proportional to 72,785.52, 109,180.08 and 20,194.92 is: 30,292.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.52 : 109,180.08 = 20,194.92 : x
  2. Step 2: Convert to fraction form
    72,785.52/109,180.08 = 20,194.92/x
  3. Step 3: Cross multiply
    72,785.52x = 109,180.08 × 20,194.92
  4. Step 4: Simplify right side
    72,785.52x = 2,204,882,981.19
  5. Step 5: Solve for x
    x = 2,204,882,981.19/72,785.52
  6. Step 6: Final answer
    x = 30,292.88

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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.