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Finding the Fourth Proportional to 263,300.30, 394,991.45 and 85,766.01

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Solution

The fourth proportional to 263,300.30, 394,991.45 and 85,766.01 is: 128,662.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,300.30 : 394,991.45 = 85,766.01 : x
  2. Step 2: Convert to fraction form
    263,300.30/394,991.45 = 85,766.01/x
  3. Step 3: Cross multiply
    263,300.30x = 394,991.45 × 85,766.01
  4. Step 4: Simplify right side
    263,300.30x = 33,876,842,515.54
  5. Step 5: Solve for x
    x = 33,876,842,515.54/263,300.30
  6. Step 6: Final answer
    x = 128,662.38

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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.