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Finding the Fourth Proportional to 262,761.12, 394,039.44 and 85,225.20

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Solution

The fourth proportional to 262,761.12, 394,039.44 and 85,225.20 is: 127,804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,761.12 : 394,039.44 = 85,225.20 : x
  2. Step 2: Convert to fraction form
    262,761.12/394,039.44 = 85,225.20/x
  3. Step 3: Cross multiply
    262,761.12x = 394,039.44 × 85,225.20
  4. Step 4: Simplify right side
    262,761.12x = 33,582,090,081.89
  5. Step 5: Solve for x
    x = 33,582,090,081.89/262,761.12
  6. Step 6: Final answer
    x = 127,804.64

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