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Finding the Fourth Proportional to 87,115.64, 120,287.30 and 66,940.72

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Solution

The fourth proportional to 87,115.64, 120,287.30 and 66,940.72 is: 92,430.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,115.64 : 120,287.30 = 66,940.72 : x
  2. Step 2: Convert to fraction form
    87,115.64/120,287.30 = 66,940.72/x
  3. Step 3: Cross multiply
    87,115.64x = 120,287.30 × 66,940.72
  4. Step 4: Simplify right side
    87,115.64x = 8,052,118,468.86
  5. Step 5: Solve for x
    x = 8,052,118,468.86/87,115.64
  6. Step 6: Final answer
    x = 92,430.23

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