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Finding the Fourth Proportional to 80,712.60, 121,025.70 and 33,912.60

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Solution

The fourth proportional to 80,712.60, 121,025.70 and 33,912.60 is: 50,850.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,712.60 : 121,025.70 = 33,912.60 : x
  2. Step 2: Convert to fraction form
    80,712.60/121,025.70 = 33,912.60/x
  3. Step 3: Cross multiply
    80,712.60x = 121,025.70 × 33,912.60
  4. Step 4: Simplify right side
    80,712.60x = 4,104,296,153.82
  5. Step 5: Solve for x
    x = 4,104,296,153.82/80,712.60
  6. Step 6: Final answer
    x = 50,850.75

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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.