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Finding the Fourth Proportional to 78,376.20, 117,515.70 and 45,079.80

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Solution

The fourth proportional to 78,376.20, 117,515.70 and 45,079.80 is: 67,591.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,376.20 : 117,515.70 = 45,079.80 : x
  2. Step 2: Convert to fraction form
    78,376.20/117,515.70 = 45,079.80/x
  3. Step 3: Cross multiply
    78,376.20x = 117,515.70 × 45,079.80
  4. Step 4: Simplify right side
    78,376.20x = 5,297,584,252.86
  5. Step 5: Solve for x
    x = 5,297,584,252.86/78,376.20
  6. Step 6: Final answer
    x = 67,591.75

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