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Finding the Fourth Proportional to 85,380.89, 128,059.99 and 25,408.28

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Solution

The fourth proportional to 85,380.89, 128,059.99 and 25,408.28 is: 38,109.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,380.89 : 128,059.99 = 25,408.28 : x
  2. Step 2: Convert to fraction form
    85,380.89/128,059.99 = 25,408.28/x
  3. Step 3: Cross multiply
    85,380.89x = 128,059.99 × 25,408.28
  4. Step 4: Simplify right side
    85,380.89x = 3,253,784,339.35
  5. Step 5: Solve for x
    x = 3,253,784,339.35/85,380.89
  6. Step 6: Final answer
    x = 38,109.05

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