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Finding the Fourth Proportional to 67,168.80, 100,758.84 and 20,422.08

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Solution

The fourth proportional to 67,168.80, 100,758.84 and 20,422.08 is: 30,634.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,168.80 : 100,758.84 = 20,422.08 : x
  2. Step 2: Convert to fraction form
    67,168.80/100,758.84 = 20,422.08/x
  3. Step 3: Cross multiply
    67,168.80x = 100,758.84 × 20,422.08
  4. Step 4: Simplify right side
    67,168.80x = 2,057,705,091.19
  5. Step 5: Solve for x
    x = 2,057,705,091.19/67,168.80
  6. Step 6: Final answer
    x = 30,634.83

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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.