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Finding the Fourth Proportional to 85,403.52, 128,083.20 and 25,417.92

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Solution

The fourth proportional to 85,403.52, 128,083.20 and 25,417.92 is: 38,120.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.52 : 128,083.20 = 25,417.92 : x
  2. Step 2: Convert to fraction form
    85,403.52/128,083.20 = 25,417.92/x
  3. Step 3: Cross multiply
    85,403.52x = 128,083.20 × 25,417.92
  4. Step 4: Simplify right side
    85,403.52x = 3,255,608,530.94
  5. Step 5: Solve for x
    x = 3,255,608,530.94/85,403.52
  6. Step 6: Final answer
    x = 38,120.31

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