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Finding the Fourth Proportional to 290,485.77, 435,750.39 and 80,121.75

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Solution

The fourth proportional to 290,485.77, 435,750.39 and 80,121.75 is: 120,188.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,485.77 : 435,750.39 = 80,121.75 : x
  2. Step 2: Convert to fraction form
    290,485.77/435,750.39 = 80,121.75/x
  3. Step 3: Cross multiply
    290,485.77x = 435,750.39 × 80,121.75
  4. Step 4: Simplify right side
    290,485.77x = 34,913,083,809.98
  5. Step 5: Solve for x
    x = 34,913,083,809.98/290,485.77
  6. Step 6: Final answer
    x = 120,188.62

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