Home / 258,932.80-388,399.20-71,944.30

Finding the Fourth Proportional to 258,932.80, 388,399.20 and 71,944.30

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Solution

The fourth proportional to 258,932.80, 388,399.20 and 71,944.30 is: 107,916.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,932.80 : 388,399.20 = 71,944.30 : x
  2. Step 2: Convert to fraction form
    258,932.80/388,399.20 = 71,944.30/x
  3. Step 3: Cross multiply
    258,932.80x = 388,399.20 × 71,944.30
  4. Step 4: Simplify right side
    258,932.80x = 27,943,108,564.56
  5. Step 5: Solve for x
    x = 27,943,108,564.56/258,932.80
  6. Step 6: Final answer
    x = 107,916.45

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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.