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Finding the Fourth Proportional to 258,268.92, 387,412.12 and 68,729.47

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Solution

The fourth proportional to 258,268.92, 387,412.12 and 68,729.47 is: 103,096.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,268.92 : 387,412.12 = 68,729.47 : x
  2. Step 2: Convert to fraction form
    258,268.92/387,412.12 = 68,729.47/x
  3. Step 3: Cross multiply
    258,268.92x = 387,412.12 × 68,729.47
  4. Step 4: Simplify right side
    258,268.92x = 26,626,629,679.18
  5. Step 5: Solve for x
    x = 26,626,629,679.18/258,268.92
  6. Step 6: Final answer
    x = 103,096.53

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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.