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Finding the Fourth Proportional to 280,904.40, 421,356.60 and 81,231.30

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Solution

The fourth proportional to 280,904.40, 421,356.60 and 81,231.30 is: 121,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,904.40 : 421,356.60 = 81,231.30 : x
  2. Step 2: Convert to fraction form
    280,904.40/421,356.60 = 81,231.30/x
  3. Step 3: Cross multiply
    280,904.40x = 421,356.60 × 81,231.30
  4. Step 4: Simplify right side
    280,904.40x = 34,227,344,381.58
  5. Step 5: Solve for x
    x = 34,227,344,381.58/280,904.40
  6. Step 6: Final answer
    x = 121,846.95

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