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Finding the Fourth Proportional to 258,268.42, 387,411.37 and 68,728.97

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Solution

The fourth proportional to 258,268.42, 387,411.37 and 68,728.97 is: 103,095.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,268.42 : 387,411.37 = 68,728.97 : x
  2. Step 2: Convert to fraction form
    258,268.42/387,411.37 = 68,728.97/x
  3. Step 3: Cross multiply
    258,268.42x = 387,411.37 × 68,728.97
  4. Step 4: Simplify right side
    258,268.42x = 26,626,384,326.80
  5. Step 5: Solve for x
    x = 26,626,384,326.80/258,268.42
  6. Step 6: Final answer
    x = 103,095.78

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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.