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Finding the Fourth Proportional to 221,990.62, 332,930.50 and 87,082.11

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Solution

The fourth proportional to 221,990.62, 332,930.50 and 87,082.11 is: 130,601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,990.62 : 332,930.50 = 87,082.11 : x
  2. Step 2: Convert to fraction form
    221,990.62/332,930.50 = 87,082.11/x
  3. Step 3: Cross multiply
    221,990.62x = 332,930.50 × 87,082.11
  4. Step 4: Simplify right side
    221,990.62x = 28,992,290,423.36
  5. Step 5: Solve for x
    x = 28,992,290,423.36/221,990.62
  6. Step 6: Final answer
    x = 130,601.42

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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.