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Finding the Fourth Proportional to 402,450.91, 603,704.30 and 136,121.39

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Solution

The fourth proportional to 402,450.91, 603,704.30 and 136,121.39 is: 204,191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,450.91 : 603,704.30 = 136,121.39 : x
  2. Step 2: Convert to fraction form
    402,450.91/603,704.30 = 136,121.39/x
  3. Step 3: Cross multiply
    402,450.91x = 603,704.30 × 136,121.39
  4. Step 4: Simplify right side
    402,450.91x = 82,177,068,464.98
  5. Step 5: Solve for x
    x = 82,177,068,464.98/402,450.91
  6. Step 6: Final answer
    x = 204,191.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.