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Finding the Fourth Proportional to 221,857.38, 332,619.89 and 72,008.19

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Solution

The fourth proportional to 221,857.38, 332,619.89 and 72,008.19 is: 107,958.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,857.38 : 332,619.89 = 72,008.19 : x
  2. Step 2: Convert to fraction form
    221,857.38/332,619.89 = 72,008.19/x
  3. Step 3: Cross multiply
    221,857.38x = 332,619.89 × 72,008.19
  4. Step 4: Simplify right side
    221,857.38x = 23,951,355,876.86
  5. Step 5: Solve for x
    x = 23,951,355,876.86/221,857.38
  6. Step 6: Final answer
    x = 107,958.35

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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.