Home / 259,228.73-388,806.10-81,712.64

Finding the Fourth Proportional to 259,228.73, 388,806.10 and 81,712.64

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Solution

The fourth proportional to 259,228.73, 388,806.10 and 81,712.64 is: 122,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,228.73 : 388,806.10 = 81,712.64 : x
  2. Step 2: Convert to fraction form
    259,228.73/388,806.10 = 81,712.64/x
  3. Step 3: Cross multiply
    259,228.73x = 388,806.10 × 81,712.64
  4. Step 4: Simplify right side
    259,228.73x = 31,770,372,879.10
  5. Step 5: Solve for x
    x = 31,770,372,879.10/259,228.73
  6. Step 6: Final answer
    x = 122,557.30

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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.