Home / 259,609.95-389,413.04-139,723.20

Finding the Fourth Proportional to 259,609.95, 389,413.04 and 139,723.20

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Solution

The fourth proportional to 259,609.95, 389,413.04 and 139,723.20 is: 209,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,609.95 : 389,413.04 = 139,723.20 : x
  2. Step 2: Convert to fraction form
    259,609.95/389,413.04 = 139,723.20/x
  3. Step 3: Cross multiply
    259,609.95x = 389,413.04 × 139,723.20
  4. Step 4: Simplify right side
    259,609.95x = 54,410,035,371.91
  5. Step 5: Solve for x
    x = 54,410,035,371.91/259,609.95
  6. Step 6: Final answer
    x = 209,583.78

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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.