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Finding the Fourth Proportional to 67,289.32, 100,934.39 and 20,542.20

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Solution

The fourth proportional to 67,289.32, 100,934.39 and 20,542.20 is: 30,813.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,289.32 : 100,934.39 = 20,542.20 : x
  2. Step 2: Convert to fraction form
    67,289.32/100,934.39 = 20,542.20/x
  3. Step 3: Cross multiply
    67,289.32x = 100,934.39 × 20,542.20
  4. Step 4: Simplify right side
    67,289.32x = 2,073,414,426.26
  5. Step 5: Solve for x
    x = 2,073,414,426.26/67,289.32
  6. Step 6: Final answer
    x = 30,813.43

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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.