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Finding the Fourth Proportional to 76,814.60, 115,221.90 and 47,136.20

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Solution

The fourth proportional to 76,814.60, 115,221.90 and 47,136.20 is: 70,704.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,814.60 : 115,221.90 = 47,136.20 : x
  2. Step 2: Convert to fraction form
    76,814.60/115,221.90 = 47,136.20/x
  3. Step 3: Cross multiply
    76,814.60x = 115,221.90 × 47,136.20
  4. Step 4: Simplify right side
    76,814.60x = 5,431,122,522.78
  5. Step 5: Solve for x
    x = 5,431,122,522.78/76,814.60
  6. Step 6: Final answer
    x = 70,704.30

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