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Finding the Fourth Proportional to 80,105.20, 120,125.40 and 27,487.60

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Solution

The fourth proportional to 80,105.20, 120,125.40 and 27,487.60 is: 41,220.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,105.20 : 120,125.40 = 27,487.60 : x
  2. Step 2: Convert to fraction form
    80,105.20/120,125.40 = 27,487.60/x
  3. Step 3: Cross multiply
    80,105.20x = 120,125.40 × 27,487.60
  4. Step 4: Simplify right side
    80,105.20x = 3,301,958,945.04
  5. Step 5: Solve for x
    x = 3,301,958,945.04/80,105.20
  6. Step 6: Final answer
    x = 41,220.28

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1.5x scale

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.