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Finding the Fourth Proportional to 203,704.51, 281,163.89 and 139,199.85

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Solution

The fourth proportional to 203,704.51, 281,163.89 and 139,199.85 is: 192,131.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,704.51 : 281,163.89 = 139,199.85 : x
  2. Step 2: Convert to fraction form
    203,704.51/281,163.89 = 139,199.85/x
  3. Step 3: Cross multiply
    203,704.51x = 281,163.89 × 139,199.85
  4. Step 4: Simplify right side
    203,704.51x = 39,137,972,715.78
  5. Step 5: Solve for x
    x = 39,137,972,715.78/203,704.51
  6. Step 6: Final answer
    x = 192,131.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.