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Finding the Fourth Proportional to 172,704.33, 259,091.42 and 72,864.77

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Solution

The fourth proportional to 172,704.33, 259,091.42 and 72,864.77 is: 109,311.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,704.33 : 259,091.42 = 72,864.77 : x
  2. Step 2: Convert to fraction form
    172,704.33/259,091.42 = 72,864.77/x
  3. Step 3: Cross multiply
    172,704.33x = 259,091.42 × 72,864.77
  4. Step 4: Simplify right side
    172,704.33x = 18,878,635,067.49
  5. Step 5: Solve for x
    x = 18,878,635,067.49/172,704.33
  6. Step 6: Final answer
    x = 109,311.88

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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.