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Finding the Fourth Proportional to 80,512.60, 120,725.70 and 33,712.60

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Solution

The fourth proportional to 80,512.60, 120,725.70 and 33,712.60 is: 50,550.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,512.60 : 120,725.70 = 33,712.60 : x
  2. Step 2: Convert to fraction form
    80,512.60/120,725.70 = 33,712.60/x
  3. Step 3: Cross multiply
    80,512.60x = 120,725.70 × 33,712.60
  4. Step 4: Simplify right side
    80,512.60x = 4,069,977,233.82
  5. Step 5: Solve for x
    x = 4,069,977,233.82/80,512.60
  6. Step 6: Final answer
    x = 50,550.81

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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.