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Finding the Fourth Proportional to 281,230.60, 421,845.90 and 91,690.60

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Solution

The fourth proportional to 281,230.60, 421,845.90 and 91,690.60 is: 137,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,230.60 : 421,845.90 = 91,690.60 : x
  2. Step 2: Convert to fraction form
    281,230.60/421,845.90 = 91,690.60/x
  3. Step 3: Cross multiply
    281,230.60x = 421,845.90 × 91,690.60
  4. Step 4: Simplify right side
    281,230.60x = 38,679,303,678.54
  5. Step 5: Solve for x
    x = 38,679,303,678.54/281,230.60
  6. Step 6: Final answer
    x = 137,535.90

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