Home / 258,926.24-388,391.92-81,429.28

Finding the Fourth Proportional to 258,926.24, 388,391.92 and 81,429.28

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Solution

The fourth proportional to 258,926.24, 388,391.92 and 81,429.28 is: 122,144.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,926.24 : 388,391.92 = 81,429.28 : x
  2. Step 2: Convert to fraction form
    258,926.24/388,391.92 = 81,429.28/x
  3. Step 3: Cross multiply
    258,926.24x = 388,391.92 × 81,429.28
  4. Step 4: Simplify right side
    258,926.24x = 31,626,474,403.42
  5. Step 5: Solve for x
    x = 31,626,474,403.42/258,926.24
  6. Step 6: Final answer
    x = 122,144.73

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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.