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Finding the Fourth Proportional to 221,891.81, 332,804.90 and 81,617.63

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Solution

The fourth proportional to 221,891.81, 332,804.90 and 81,617.63 is: 122,414.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,891.81 : 332,804.90 = 81,617.63 : x
  2. Step 2: Convert to fraction form
    221,891.81/332,804.90 = 81,617.63/x
  3. Step 3: Cross multiply
    221,891.81x = 332,804.90 × 81,617.63
  4. Step 4: Simplify right side
    221,891.81x = 27,162,745,730.41
  5. Step 5: Solve for x
    x = 27,162,745,730.41/221,891.81
  6. Step 6: Final answer
    x = 122,414.37

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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.