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Finding the Fourth Proportional to 72,179.73, 108,268.41 and 21,578.88

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Solution

The fourth proportional to 72,179.73, 108,268.41 and 21,578.88 is: 32,367.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,179.73 : 108,268.41 = 21,578.88 : x
  2. Step 2: Convert to fraction form
    72,179.73/108,268.41 = 21,578.88/x
  3. Step 3: Cross multiply
    72,179.73x = 108,268.41 × 21,578.88
  4. Step 4: Simplify right side
    72,179.73x = 2,336,311,027.18
  5. Step 5: Solve for x
    x = 2,336,311,027.18/72,179.73
  6. Step 6: Final answer
    x = 32,367.97

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1.5x scale

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.