Home / 143,136.20-214,704.30-139,855.70

Finding the Fourth Proportional to 143,136.20, 214,704.30 and 139,855.70

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Solution

The fourth proportional to 143,136.20, 214,704.30 and 139,855.70 is: 209,783.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,136.20 : 214,704.30 = 139,855.70 : x
  2. Step 2: Convert to fraction form
    143,136.20/214,704.30 = 139,855.70/x
  3. Step 3: Cross multiply
    143,136.20x = 214,704.30 × 139,855.70
  4. Step 4: Simplify right side
    143,136.20x = 30,027,620,169.51
  5. Step 5: Solve for x
    x = 30,027,620,169.51/143,136.20
  6. Step 6: Final answer
    x = 209,783.55

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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.