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Finding the Fourth Proportional to 259,413.59, 389,091.21 and 69,887.96

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Solution

The fourth proportional to 259,413.59, 389,091.21 and 69,887.96 is: 104,824.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,413.59 : 389,091.21 = 69,887.96 : x
  2. Step 2: Convert to fraction form
    259,413.59/389,091.21 = 69,887.96/x
  3. Step 3: Cross multiply
    259,413.59x = 389,091.21 × 69,887.96
  4. Step 4: Simplify right side
    259,413.59x = 27,192,790,920.83
  5. Step 5: Solve for x
    x = 27,192,790,920.83/259,413.59
  6. Step 6: Final answer
    x = 104,824.08

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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.