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Finding the Fourth Proportional to 258,983.75, 388,651.80 and 92,771.75

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Solution

The fourth proportional to 258,983.75, 388,651.80 and 92,771.75 is: 139,220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,983.75 : 388,651.80 = 92,771.75 : x
  2. Step 2: Convert to fraction form
    258,983.75/388,651.80 = 92,771.75/x
  3. Step 3: Cross multiply
    258,983.75x = 388,651.80 × 92,771.75
  4. Step 4: Simplify right side
    258,983.75x = 36,055,907,626.65
  5. Step 5: Solve for x
    x = 36,055,907,626.65/258,983.75
  6. Step 6: Final answer
    x = 139,220.73

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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.