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Finding the Fourth Proportional to 221,803.32, 332,836.74 and 81,660.36

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Solution

The fourth proportional to 221,803.32, 332,836.74 and 81,660.36 is: 122,539.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,803.32 : 332,836.74 = 81,660.36 : x
  2. Step 2: Convert to fraction form
    221,803.32/332,836.74 = 81,660.36/x
  3. Step 3: Cross multiply
    221,803.32x = 332,836.74 × 81,660.36
  4. Step 4: Simplify right side
    221,803.32x = 27,179,568,009.63
  5. Step 5: Solve for x
    x = 27,179,568,009.63/221,803.32
  6. Step 6: Final answer
    x = 122,539.05

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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.