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Finding the Fourth Proportional to 192,415.20, 288,428.40 and 87,309.60

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Solution

The fourth proportional to 192,415.20, 288,428.40 and 87,309.60 is: 130,876.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,415.20 : 288,428.40 = 87,309.60 : x
  2. Step 2: Convert to fraction form
    192,415.20/288,428.40 = 87,309.60/x
  3. Step 3: Cross multiply
    192,415.20x = 288,428.40 × 87,309.60
  4. Step 4: Simplify right side
    192,415.20x = 25,182,568,232.64
  5. Step 5: Solve for x
    x = 25,182,568,232.64/192,415.20
  6. Step 6: Final answer
    x = 130,876.19

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