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Finding the Fourth Proportional to 400,172.09, 600,195.49 and 133,930.49

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Solution

The fourth proportional to 400,172.09, 600,195.49 and 133,930.49 is: 200,874.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,172.09 : 600,195.49 = 133,930.49 : x
  2. Step 2: Convert to fraction form
    400,172.09/600,195.49 = 133,930.49/x
  3. Step 3: Cross multiply
    400,172.09x = 600,195.49 × 133,930.49
  4. Step 4: Simplify right side
    400,172.09x = 80,384,472,735.69
  5. Step 5: Solve for x
    x = 80,384,472,735.69/400,172.09
  6. Step 6: Final answer
    x = 200,874.76

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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.