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Finding the Fourth Proportional to 143,138.80, 214,524.60 and 79,958.80

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Solution

The fourth proportional to 143,138.80, 214,524.60 and 79,958.80 is: 119,835.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,138.80 : 214,524.60 = 79,958.80 : x
  2. Step 2: Convert to fraction form
    143,138.80/214,524.60 = 79,958.80/x
  3. Step 3: Cross multiply
    143,138.80x = 214,524.60 × 79,958.80
  4. Step 4: Simplify right side
    143,138.80x = 17,153,129,586.48
  5. Step 5: Solve for x
    x = 17,153,129,586.48/143,138.80
  6. Step 6: Final answer
    x = 119,835.64

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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.