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Finding the Fourth Proportional to 221,477.55, 332,216.33 and 81,217.95

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Solution

The fourth proportional to 221,477.55, 332,216.33 and 81,217.95 is: 121,826.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,477.55 : 332,216.33 = 81,217.95 : x
  2. Step 2: Convert to fraction form
    221,477.55/332,216.33 = 81,217.95/x
  3. Step 3: Cross multiply
    221,477.55x = 332,216.33 × 81,217.95
  4. Step 4: Simplify right side
    221,477.55x = 26,981,928,873.03
  5. Step 5: Solve for x
    x = 26,981,928,873.03/221,477.55
  6. Step 6: Final answer
    x = 121,826.93

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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.