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Finding the Fourth Proportional to 221,804.32, 332,838.24 and 81,661.36

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Solution

The fourth proportional to 221,804.32, 332,838.24 and 81,661.36 is: 122,540.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,804.32 : 332,838.24 = 81,661.36 : x
  2. Step 2: Convert to fraction form
    221,804.32/332,838.24 = 81,661.36/x
  3. Step 3: Cross multiply
    221,804.32x = 332,838.24 × 81,661.36
  4. Step 4: Simplify right side
    221,804.32x = 27,180,023,338.41
  5. Step 5: Solve for x
    x = 27,180,023,338.41/221,804.32
  6. Step 6: Final answer
    x = 122,540.55

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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.