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Finding the Fourth Proportional to 221,613.20, 332,201.10 and 109,201.40

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Solution

The fourth proportional to 221,613.20, 332,201.10 and 109,201.40 is: 163,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,613.20 : 332,201.10 = 109,201.40 : x
  2. Step 2: Convert to fraction form
    221,613.20/332,201.10 = 109,201.40/x
  3. Step 3: Cross multiply
    221,613.20x = 332,201.10 × 109,201.40
  4. Step 4: Simplify right side
    221,613.20x = 36,276,825,201.54
  5. Step 5: Solve for x
    x = 36,276,825,201.54/221,613.20
  6. Step 6: Final answer
    x = 163,694.33

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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.