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Finding the Fourth Proportional to 100,452.35, 150,474.05 and 80,623.55

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Solution

The fourth proportional to 100,452.35, 150,474.05 and 80,623.55 is: 120,771.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,452.35 : 150,474.05 = 80,623.55 : x
  2. Step 2: Convert to fraction form
    100,452.35/150,474.05 = 80,623.55/x
  3. Step 3: Cross multiply
    100,452.35x = 150,474.05 × 80,623.55
  4. Step 4: Simplify right side
    100,452.35x = 12,131,751,690.76
  5. Step 5: Solve for x
    x = 12,131,751,690.76/100,452.35
  6. Step 6: Final answer
    x = 120,771.21

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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.