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Finding the Fourth Proportional to 72,342.40, 108,481.20 and 32,879.20

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Solution

The fourth proportional to 72,342.40, 108,481.20 and 32,879.20 is: 49,304.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,342.40 : 108,481.20 = 32,879.20 : x
  2. Step 2: Convert to fraction form
    72,342.40/108,481.20 = 32,879.20/x
  3. Step 3: Cross multiply
    72,342.40x = 108,481.20 × 32,879.20
  4. Step 4: Simplify right side
    72,342.40x = 3,566,775,071.04
  5. Step 5: Solve for x
    x = 3,566,775,071.04/72,342.40
  6. Step 6: Final answer
    x = 49,304.07

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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.