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Finding the Fourth Proportional to 85,436.90, 128,155.39 and 22,256.85

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Solution

The fourth proportional to 85,436.90, 128,155.39 and 22,256.85 is: 33,385.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,436.90 : 128,155.39 = 22,256.85 : x
  2. Step 2: Convert to fraction form
    85,436.90/128,155.39 = 22,256.85/x
  3. Step 3: Cross multiply
    85,436.90x = 128,155.39 × 22,256.85
  4. Step 4: Simplify right side
    85,436.90x = 2,852,335,236.28
  5. Step 5: Solve for x
    x = 2,852,335,236.28/85,436.90
  6. Step 6: Final answer
    x = 33,385.29

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