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Finding the Fourth Proportional to 85,906.36, 128,815.80 and 33,330.88

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Solution

The fourth proportional to 85,906.36, 128,815.80 and 33,330.88 is: 49,979.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,906.36 : 128,815.80 = 33,330.88 : x
  2. Step 2: Convert to fraction form
    85,906.36/128,815.80 = 33,330.88/x
  3. Step 3: Cross multiply
    85,906.36x = 128,815.80 × 33,330.88
  4. Step 4: Simplify right side
    85,906.36x = 4,293,543,971.90
  5. Step 5: Solve for x
    x = 4,293,543,971.90/85,906.36
  6. Step 6: Final answer
    x = 49,979.35

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