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Finding the Fourth Proportional to 102,111.60, 140,912.88 and 56,789.28

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Solution

The fourth proportional to 102,111.60, 140,912.88 and 56,789.28 is: 78,368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,111.60 : 140,912.88 = 56,789.28 : x
  2. Step 2: Convert to fraction form
    102,111.60/140,912.88 = 56,789.28/x
  3. Step 3: Cross multiply
    102,111.60x = 140,912.88 × 56,789.28
  4. Step 4: Simplify right side
    102,111.60x = 8,002,340,997.93
  5. Step 5: Solve for x
    x = 8,002,340,997.93/102,111.60
  6. Step 6: Final answer
    x = 78,368.58

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