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Finding the Fourth Proportional to 263,112.60, 394,672.50 and 85,620.54

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Solution

The fourth proportional to 263,112.60, 394,672.50 and 85,620.54 is: 128,431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,112.60 : 394,672.50 = 85,620.54 : x
  2. Step 2: Convert to fraction form
    263,112.60/394,672.50 = 85,620.54/x
  3. Step 3: Cross multiply
    263,112.60x = 394,672.50 × 85,620.54
  4. Step 4: Simplify right side
    263,112.60x = 33,792,072,573.15
  5. Step 5: Solve for x
    x = 33,792,072,573.15/263,112.60
  6. Step 6: Final answer
    x = 128,431.98

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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.