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Finding the Fourth Proportional to 85,696.64, 128,495.64 and 33,099.20

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Solution

The fourth proportional to 85,696.64, 128,495.64 and 33,099.20 is: 49,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,696.64 : 128,495.64 = 33,099.20 : x
  2. Step 2: Convert to fraction form
    85,696.64/128,495.64 = 33,099.20/x
  3. Step 3: Cross multiply
    85,696.64x = 128,495.64 × 33,099.20
  4. Step 4: Simplify right side
    85,696.64x = 4,253,102,887.49
  5. Step 5: Solve for x
    x = 4,253,102,887.49/85,696.64
  6. Step 6: Final answer
    x = 49,629.75

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