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Finding the Fourth Proportional to 67,200.28, 100,800.42 and 20,452.78

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Solution

The fourth proportional to 67,200.28, 100,800.42 and 20,452.78 is: 30,679.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,200.28 : 100,800.42 = 20,452.78 : x
  2. Step 2: Convert to fraction form
    67,200.28/100,800.42 = 20,452.78/x
  3. Step 3: Cross multiply
    67,200.28x = 100,800.42 × 20,452.78
  4. Step 4: Simplify right side
    67,200.28x = 2,061,648,814.17
  5. Step 5: Solve for x
    x = 2,061,648,814.17/67,200.28
  6. Step 6: Final answer
    x = 30,679.17

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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.