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Finding the Fourth Proportional to 258,220.38, 387,299.74 and 68,694.66

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Solution

The fourth proportional to 258,220.38, 387,299.74 and 68,694.66 is: 103,033.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,220.38 : 387,299.74 = 68,694.66 : x
  2. Step 2: Convert to fraction form
    258,220.38/387,299.74 = 68,694.66/x
  3. Step 3: Cross multiply
    258,220.38x = 387,299.74 × 68,694.66
  4. Step 4: Simplify right side
    258,220.38x = 26,605,423,957.39
  5. Step 5: Solve for x
    x = 26,605,423,957.39/258,220.38
  6. Step 6: Final answer
    x = 103,033.79

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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.