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Finding the Fourth Proportional to 72,168.20, 108,268.70 and 32,736.58

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Solution

The fourth proportional to 72,168.20, 108,268.70 and 32,736.58 is: 49,112.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,168.20 : 108,268.70 = 32,736.58 : x
  2. Step 2: Convert to fraction form
    72,168.20/108,268.70 = 32,736.58/x
  3. Step 3: Cross multiply
    72,168.20x = 108,268.70 × 32,736.58
  4. Step 4: Simplify right side
    72,168.20x = 3,544,346,959.05
  5. Step 5: Solve for x
    x = 3,544,346,959.05/72,168.20
  6. Step 6: Final answer
    x = 49,112.31

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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.