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Finding the Fourth Proportional to 100,243.86, 138,336.52 and 54,923.56

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Solution

The fourth proportional to 100,243.86, 138,336.52 and 54,923.56 is: 75,794.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,243.86 : 138,336.52 = 54,923.56 : x
  2. Step 2: Convert to fraction form
    100,243.86/138,336.52 = 54,923.56/x
  3. Step 3: Cross multiply
    100,243.86x = 138,336.52 × 54,923.56
  4. Step 4: Simplify right side
    100,243.86x = 7,597,933,464.73
  5. Step 5: Solve for x
    x = 7,597,933,464.73/100,243.86
  6. Step 6: Final answer
    x = 75,794.50

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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.