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Finding the Fourth Proportional to 221,072.80, 331,738.80 and 80,845.60

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Solution

The fourth proportional to 221,072.80, 331,738.80 and 80,845.60 is: 121,315.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,072.80 : 331,738.80 = 80,845.60 : x
  2. Step 2: Convert to fraction form
    221,072.80/331,738.80 = 80,845.60/x
  3. Step 3: Cross multiply
    221,072.80x = 331,738.80 × 80,845.60
  4. Step 4: Simplify right side
    221,072.80x = 26,819,622,329.28
  5. Step 5: Solve for x
    x = 26,819,622,329.28/221,072.80
  6. Step 6: Final answer
    x = 121,315.79

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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.