Home / 143,469.50-197,986.97-78,942.67

Finding the Fourth Proportional to 143,469.50, 197,986.97 and 78,942.67

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Solution

The fourth proportional to 143,469.50, 197,986.97 and 78,942.67 is: 108,940.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,469.50 : 197,986.97 = 78,942.67 : x
  2. Step 2: Convert to fraction form
    143,469.50/197,986.97 = 78,942.67/x
  3. Step 3: Cross multiply
    143,469.50x = 197,986.97 × 78,942.67
  4. Step 4: Simplify right side
    143,469.50x = 15,629,619,739.40
  5. Step 5: Solve for x
    x = 15,629,619,739.40/143,469.50
  6. Step 6: Final answer
    x = 108,940.37

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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.