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Finding the Fourth Proportional to 72,379.62, 108,501.39 and 39,049.74

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Solution

The fourth proportional to 72,379.62, 108,501.39 and 39,049.74 is: 58,537.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,379.62 : 108,501.39 = 39,049.74 : x
  2. Step 2: Convert to fraction form
    72,379.62/108,501.39 = 39,049.74/x
  3. Step 3: Cross multiply
    72,379.62x = 108,501.39 × 39,049.74
  4. Step 4: Simplify right side
    72,379.62x = 4,236,951,069.14
  5. Step 5: Solve for x
    x = 4,236,951,069.14/72,379.62
  6. Step 6: Final answer
    x = 58,537.90

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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.