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Finding the Fourth Proportional to 258,270.42, 387,414.37 and 68,730.97

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Solution

The fourth proportional to 258,270.42, 387,414.37 and 68,730.97 is: 103,098.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,270.42 : 387,414.37 = 68,730.97 : x
  2. Step 2: Convert to fraction form
    258,270.42/387,414.37 = 68,730.97/x
  3. Step 3: Cross multiply
    258,270.42x = 387,414.37 × 68,730.97
  4. Step 4: Simplify right side
    258,270.42x = 26,627,365,442.04
  5. Step 5: Solve for x
    x = 26,627,365,442.04/258,270.42
  6. Step 6: Final answer
    x = 103,098.78

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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.