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Finding the Fourth Proportional to 321,581.75, 443,771.66 and 178,355.12

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Solution

The fourth proportional to 321,581.75, 443,771.66 and 178,355.12 is: 246,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,581.75 : 443,771.66 = 178,355.12 : x
  2. Step 2: Convert to fraction form
    321,581.75/443,771.66 = 178,355.12/x
  3. Step 3: Cross multiply
    321,581.75x = 443,771.66 × 178,355.12
  4. Step 4: Simplify right side
    321,581.75x = 79,148,944,561.27
  5. Step 5: Solve for x
    x = 79,148,944,561.27/321,581.75
  6. Step 6: Final answer
    x = 246,123.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.