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Finding the Fourth Proportional to 258,269.42, 387,412.87 and 68,729.97

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Solution

The fourth proportional to 258,269.42, 387,412.87 and 68,729.97 is: 103,097.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,269.42 : 387,412.87 = 68,729.97 : x
  2. Step 2: Convert to fraction form
    258,269.42/387,412.87 = 68,729.97/x
  3. Step 3: Cross multiply
    258,269.42x = 387,412.87 × 68,729.97
  4. Step 4: Simplify right side
    258,269.42x = 26,626,874,932.71
  5. Step 5: Solve for x
    x = 26,626,874,932.71/258,269.42
  6. Step 6: Final answer
    x = 103,097.28

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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.