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Finding the Fourth Proportional to 72,321.20, 108,408.90 and 32,906.60

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Solution

The fourth proportional to 72,321.20, 108,408.90 and 32,906.60 is: 49,326.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.20 : 108,408.90 = 32,906.60 : x
  2. Step 2: Convert to fraction form
    72,321.20/108,408.90 = 32,906.60/x
  3. Step 3: Cross multiply
    72,321.20x = 108,408.90 × 32,906.60
  4. Step 4: Simplify right side
    72,321.20x = 3,567,368,308.74
  5. Step 5: Solve for x
    x = 3,567,368,308.74/72,321.20
  6. Step 6: Final answer
    x = 49,326.73

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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.