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Finding the Fourth Proportional to 72,305.38, 108,481.83 and 45,620.47

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Solution

The fourth proportional to 72,305.38, 108,481.83 and 45,620.47 is: 68,445.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,305.38 : 108,481.83 = 45,620.47 : x
  2. Step 2: Convert to fraction form
    72,305.38/108,481.83 = 45,620.47/x
  3. Step 3: Cross multiply
    72,305.38x = 108,481.83 × 45,620.47
  4. Step 4: Simplify right side
    72,305.38x = 4,948,992,071.06
  5. Step 5: Solve for x
    x = 4,948,992,071.06/72,305.38
  6. Step 6: Final answer
    x = 68,445.70

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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.