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Finding the Fourth Proportional to 259,899.26, 389,806.16 and 91,379.97

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Solution

The fourth proportional to 259,899.26, 389,806.16 and 91,379.97 is: 137,054.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,899.26 : 389,806.16 = 91,379.97 : x
  2. Step 2: Convert to fraction form
    259,899.26/389,806.16 = 91,379.97/x
  3. Step 3: Cross multiply
    259,899.26x = 389,806.16 × 91,379.97
  4. Step 4: Simplify right side
    259,899.26x = 35,620,474,749.72
  5. Step 5: Solve for x
    x = 35,620,474,749.72/259,899.26
  6. Step 6: Final answer
    x = 137,054.93

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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.