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Finding the Fourth Proportional to 218,631.80, 328,005.30 and 78,375.80

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Solution

The fourth proportional to 218,631.80, 328,005.30 and 78,375.80 is: 117,584.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,631.80 : 328,005.30 = 78,375.80 : x
  2. Step 2: Convert to fraction form
    218,631.80/328,005.30 = 78,375.80/x
  3. Step 3: Cross multiply
    218,631.80x = 328,005.30 × 78,375.80
  4. Step 4: Simplify right side
    218,631.80x = 25,707,677,791.74
  5. Step 5: Solve for x
    x = 25,707,677,791.74/218,631.80
  6. Step 6: Final answer
    x = 117,584.35

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