Home / 259,110.22-388,679.28-81,631.12

Finding the Fourth Proportional to 259,110.22, 388,679.28 and 81,631.12

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Solution

The fourth proportional to 259,110.22, 388,679.28 and 81,631.12 is: 122,451.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,110.22 : 388,679.28 = 81,631.12 : x
  2. Step 2: Convert to fraction form
    259,110.22/388,679.28 = 81,631.12/x
  3. Step 3: Cross multiply
    259,110.22x = 388,679.28 × 81,631.12
  4. Step 4: Simplify right side
    259,110.22x = 31,728,324,947.19
  5. Step 5: Solve for x
    x = 31,728,324,947.19/259,110.22
  6. Step 6: Final answer
    x = 122,451.07

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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.