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Finding the Fourth Proportional to 263,064.51, 394,600.41 and 85,572.45

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Solution

The fourth proportional to 263,064.51, 394,600.41 and 85,572.45 is: 128,359.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,064.51 : 394,600.41 = 85,572.45 : x
  2. Step 2: Convert to fraction form
    263,064.51/394,600.41 = 85,572.45/x
  3. Step 3: Cross multiply
    263,064.51x = 394,600.41 × 85,572.45
  4. Step 4: Simplify right side
    263,064.51x = 33,766,923,854.70
  5. Step 5: Solve for x
    x = 33,766,923,854.70/263,064.51
  6. Step 6: Final answer
    x = 128,359.86

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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.