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Finding the Fourth Proportional to 258,465.92, 387,717.38 and 68,925.29

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Solution

The fourth proportional to 258,465.92, 387,717.38 and 68,925.29 is: 103,392.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,465.92 : 387,717.38 = 68,925.29 : x
  2. Step 2: Convert to fraction form
    258,465.92/387,717.38 = 68,925.29/x
  3. Step 3: Cross multiply
    258,465.92x = 387,717.38 × 68,925.29
  4. Step 4: Simplify right side
    258,465.92x = 26,723,530,571.33
  5. Step 5: Solve for x
    x = 26,723,530,571.33/258,465.92
  6. Step 6: Final answer
    x = 103,392.86

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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.