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Finding the Fourth Proportional to 221,619.40, 332,429.10 and 71,859.40

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Solution

The fourth proportional to 221,619.40, 332,429.10 and 71,859.40 is: 107,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,619.40 : 332,429.10 = 71,859.40 : x
  2. Step 2: Convert to fraction form
    221,619.40/332,429.10 = 71,859.40/x
  3. Step 3: Cross multiply
    221,619.40x = 332,429.10 × 71,859.40
  4. Step 4: Simplify right side
    221,619.40x = 23,888,155,668.54
  5. Step 5: Solve for x
    x = 23,888,155,668.54/221,619.40
  6. Step 6: Final answer
    x = 107,789.10

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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.