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Finding the Fourth Proportional to 72,379.39, 108,421.39 and 37,245.23

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Solution

The fourth proportional to 72,379.39, 108,421.39 and 37,245.23 is: 55,791.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,379.39 : 108,421.39 = 37,245.23 : x
  2. Step 2: Convert to fraction form
    72,379.39/108,421.39 = 37,245.23/x
  3. Step 3: Cross multiply
    72,379.39x = 108,421.39 × 37,245.23
  4. Step 4: Simplify right side
    72,379.39x = 4,038,179,918.87
  5. Step 5: Solve for x
    x = 4,038,179,918.87/72,379.39
  6. Step 6: Final answer
    x = 55,791.85

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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.