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Finding the Fourth Proportional to 67,242.52, 100,878.90 and 20,500.12

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Solution

The fourth proportional to 67,242.52, 100,878.90 and 20,500.12 is: 30,754.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,242.52 : 100,878.90 = 20,500.12 : x
  2. Step 2: Convert to fraction form
    67,242.52/100,878.90 = 20,500.12/x
  3. Step 3: Cross multiply
    67,242.52x = 100,878.90 × 20,500.12
  4. Step 4: Simplify right side
    67,242.52x = 2,068,029,555.47
  5. Step 5: Solve for x
    x = 2,068,029,555.47/67,242.52
  6. Step 6: Final answer
    x = 30,754.79

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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.