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Finding the Fourth Proportional to 258,464.42, 387,715.13 and 68,923.79

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Solution

The fourth proportional to 258,464.42, 387,715.13 and 68,923.79 is: 103,390.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,464.42 : 387,715.13 = 68,923.79 : x
  2. Step 2: Convert to fraction form
    258,464.42/387,715.13 = 68,923.79/x
  3. Step 3: Cross multiply
    258,464.42x = 387,715.13 × 68,923.79
  4. Step 4: Simplify right side
    258,464.42x = 26,722,793,916.75
  5. Step 5: Solve for x
    x = 26,722,793,916.75/258,464.42
  6. Step 6: Final answer
    x = 103,390.61

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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.