Home / 143,138.20-214,707.30-139,857.70

Finding the Fourth Proportional to 143,138.20, 214,707.30 and 139,857.70

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Solution

The fourth proportional to 143,138.20, 214,707.30 and 139,857.70 is: 209,786.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,138.20 : 214,707.30 = 139,857.70 : x
  2. Step 2: Convert to fraction form
    143,138.20/214,707.30 = 139,857.70/x
  3. Step 3: Cross multiply
    143,138.20x = 214,707.30 × 139,857.70
  4. Step 4: Simplify right side
    143,138.20x = 30,028,469,151.21
  5. Step 5: Solve for x
    x = 30,028,469,151.21/143,138.20
  6. Step 6: Final answer
    x = 209,786.55

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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.