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Finding the Fourth Proportional to 79,412.39, 119,121.83 and 20,249.60

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Solution

The fourth proportional to 79,412.39, 119,121.83 and 20,249.60 is: 30,375.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,412.39 : 119,121.83 = 20,249.60 : x
  2. Step 2: Convert to fraction form
    79,412.39/119,121.83 = 20,249.60/x
  3. Step 3: Cross multiply
    79,412.39x = 119,121.83 × 20,249.60
  4. Step 4: Simplify right side
    79,412.39x = 2,412,168,711.91
  5. Step 5: Solve for x
    x = 2,412,168,711.91/79,412.39
  6. Step 6: Final answer
    x = 30,375.22

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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.