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Finding the Fourth Proportional to 155,112.60, 232,841.70 and 85,128.60

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Solution

The fourth proportional to 155,112.60, 232,841.70 and 85,128.60 is: 127,787.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,112.60 : 232,841.70 = 85,128.60 : x
  2. Step 2: Convert to fraction form
    155,112.60/232,841.70 = 85,128.60/x
  3. Step 3: Cross multiply
    155,112.60x = 232,841.70 × 85,128.60
  4. Step 4: Simplify right side
    155,112.60x = 19,821,487,942.62
  5. Step 5: Solve for x
    x = 19,821,487,942.62/155,112.60
  6. Step 6: Final answer
    x = 127,787.74

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