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Finding the Fourth Proportional to 221,040.75, 305,036.28 and 120,438.75

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Solution

The fourth proportional to 221,040.75, 305,036.28 and 120,438.75 is: 166,205.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,040.75 : 305,036.28 = 120,438.75 : x
  2. Step 2: Convert to fraction form
    221,040.75/305,036.28 = 120,438.75/x
  3. Step 3: Cross multiply
    221,040.75x = 305,036.28 × 120,438.75
  4. Step 4: Simplify right side
    221,040.75x = 36,738,188,267.85
  5. Step 5: Solve for x
    x = 36,738,188,267.85/221,040.75
  6. Step 6: Final answer
    x = 166,205.50

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