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Finding the Fourth Proportional to 221,443.20, 332,213.40 and 71,690.40

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Solution

The fourth proportional to 221,443.20, 332,213.40 and 71,690.40 is: 107,551.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,443.20 : 332,213.40 = 71,690.40 : x
  2. Step 2: Convert to fraction form
    221,443.20/332,213.40 = 71,690.40/x
  3. Step 3: Cross multiply
    221,443.20x = 332,213.40 × 71,690.40
  4. Step 4: Simplify right side
    221,443.20x = 23,816,511,531.36
  5. Step 5: Solve for x
    x = 23,816,511,531.36/221,443.20
  6. Step 6: Final answer
    x = 107,551.33

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1.5x scale

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.