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Finding the Fourth Proportional to 263,112.48, 394,672.38 and 85,620.48

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Solution

The fourth proportional to 263,112.48, 394,672.38 and 85,620.48 is: 128,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,112.48 : 394,672.38 = 85,620.48 : x
  2. Step 2: Convert to fraction form
    263,112.48/394,672.38 = 85,620.48/x
  3. Step 3: Cross multiply
    263,112.48x = 394,672.38 × 85,620.48
  4. Step 4: Simplify right side
    263,112.48x = 33,792,038,618.34
  5. Step 5: Solve for x
    x = 33,792,038,618.34/263,112.48
  6. Step 6: Final answer
    x = 128,431.91

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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.