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Finding the Fourth Proportional to 139,541.20, 209,311.80 and 80,492.20

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Solution

The fourth proportional to 139,541.20, 209,311.80 and 80,492.20 is: 120,738.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,541.20 : 209,311.80 = 80,492.20 : x
  2. Step 2: Convert to fraction form
    139,541.20/209,311.80 = 80,492.20/x
  3. Step 3: Cross multiply
    139,541.20x = 209,311.80 × 80,492.20
  4. Step 4: Simplify right side
    139,541.20x = 16,847,967,267.96
  5. Step 5: Solve for x
    x = 16,847,967,267.96/139,541.20
  6. Step 6: Final answer
    x = 120,738.30

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