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Finding the Fourth Proportional to 72,591.54, 100,173.74 and 40,761.78

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Solution

The fourth proportional to 72,591.54, 100,173.74 and 40,761.78 is: 56,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,591.54 : 100,173.74 = 40,761.78 : x
  2. Step 2: Convert to fraction form
    72,591.54/100,173.74 = 40,761.78/x
  3. Step 3: Cross multiply
    72,591.54x = 100,173.74 × 40,761.78
  4. Step 4: Simplify right side
    72,591.54x = 4,083,259,747.85
  5. Step 5: Solve for x
    x = 4,083,259,747.85/72,591.54
  6. Step 6: Final answer
    x = 56,249.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.