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Finding the Fourth Proportional to 221,648.76, 332,321.28 and 79,491

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Solution

The fourth proportional to 221,648.76, 332,321.28 and 79,491 is: 119,182.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,648.76 : 332,321.28 = 79,491 : x
  2. Step 2: Convert to fraction form
    221,648.76/332,321.28 = 79,491/x
  3. Step 3: Cross multiply
    221,648.76x = 332,321.28 × 79,491
  4. Step 4: Simplify right side
    221,648.76x = 26,416,550,868.48
  5. Step 5: Solve for x
    x = 26,416,550,868.48/221,648.76
  6. Step 6: Final answer
    x = 119,182.04

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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.