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Finding the Fourth Proportional to 99,451.75, 137,243.42 and 54,739.75

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Solution

The fourth proportional to 99,451.75, 137,243.42 and 54,739.75 is: 75,540.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,451.75 : 137,243.42 = 54,739.75 : x
  2. Step 2: Convert to fraction form
    99,451.75/137,243.42 = 54,739.75/x
  3. Step 3: Cross multiply
    99,451.75x = 137,243.42 × 54,739.75
  4. Step 4: Simplify right side
    99,451.75x = 7,512,670,499.95
  5. Step 5: Solve for x
    x = 7,512,670,499.95/99,451.75
  6. Step 6: Final answer
    x = 75,540.86

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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.