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Finding the Fourth Proportional to 67,249.52, 100,890.50 and 20,499.56

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Solution

The fourth proportional to 67,249.52, 100,890.50 and 20,499.56 is: 30,754.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,249.52 : 100,890.50 = 20,499.56 : x
  2. Step 2: Convert to fraction form
    67,249.52/100,890.50 = 20,499.56/x
  3. Step 3: Cross multiply
    67,249.52x = 100,890.50 × 20,499.56
  4. Step 4: Simplify right side
    67,249.52x = 2,068,210,858.18
  5. Step 5: Solve for x
    x = 2,068,210,858.18/67,249.52
  6. Step 6: Final answer
    x = 30,754.28

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Similar ratio
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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.