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Finding the Fourth Proportional to 122,940.80, 184,411.20 and 109,721.60

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Solution

The fourth proportional to 122,940.80, 184,411.20 and 109,721.60 is: 164,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,940.80 : 184,411.20 = 109,721.60 : x
  2. Step 2: Convert to fraction form
    122,940.80/184,411.20 = 109,721.60/x
  3. Step 3: Cross multiply
    122,940.80x = 184,411.20 × 109,721.60
  4. Step 4: Simplify right side
    122,940.80x = 20,233,891,921.92
  5. Step 5: Solve for x
    x = 20,233,891,921.92/122,940.80
  6. Step 6: Final answer
    x = 164,582.40

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