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Finding the Fourth Proportional to 262,720.72, 394,136.46 and 85,213.92

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Solution

The fourth proportional to 262,720.72, 394,136.46 and 85,213.92 is: 127,838.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,720.72 : 394,136.46 = 85,213.92 : x
  2. Step 2: Convert to fraction form
    262,720.72/394,136.46 = 85,213.92/x
  3. Step 3: Cross multiply
    262,720.72x = 394,136.46 × 85,213.92
  4. Step 4: Simplify right side
    262,720.72x = 33,585,912,771.52
  5. Step 5: Solve for x
    x = 33,585,912,771.52/262,720.72
  6. Step 6: Final answer
    x = 127,838.84

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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.