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Finding the Fourth Proportional to 221,672.09, 332,554.90 and 71,900.75

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Solution

The fourth proportional to 221,672.09, 332,554.90 and 71,900.75 is: 107,866.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,672.09 : 332,554.90 = 71,900.75 : x
  2. Step 2: Convert to fraction form
    221,672.09/332,554.90 = 71,900.75/x
  3. Step 3: Cross multiply
    221,672.09x = 332,554.90 × 71,900.75
  4. Step 4: Simplify right side
    221,672.09x = 23,910,947,377.81
  5. Step 5: Solve for x
    x = 23,910,947,377.81/221,672.09
  6. Step 6: Final answer
    x = 107,866.30

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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.