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Finding the Fourth Proportional to 312,391.43, 468,605.33 and 87,769.39

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Solution

The fourth proportional to 312,391.43, 468,605.33 and 87,769.39 is: 131,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,391.43 : 468,605.33 = 87,769.39 : x
  2. Step 2: Convert to fraction form
    312,391.43/468,605.33 = 87,769.39/x
  3. Step 3: Cross multiply
    312,391.43x = 468,605.33 × 87,769.39
  4. Step 4: Simplify right side
    312,391.43x = 41,129,203,964.85
  5. Step 5: Solve for x
    x = 41,129,203,964.85/312,391.43
  6. Step 6: Final answer
    x = 131,659.19

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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.