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Finding the Fourth Proportional to 419,737.20, 629,548.20 and 139,225.20

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Solution

The fourth proportional to 419,737.20, 629,548.20 and 139,225.20 is: 208,818.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,737.20 : 629,548.20 = 139,225.20 : x
  2. Step 2: Convert to fraction form
    419,737.20/629,548.20 = 139,225.20/x
  3. Step 3: Cross multiply
    419,737.20x = 629,548.20 × 139,225.20
  4. Step 4: Simplify right side
    419,737.20x = 87,648,974,054.64
  5. Step 5: Solve for x
    x = 87,648,974,054.64/419,737.20
  6. Step 6: Final answer
    x = 208,818.69

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