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Finding the Fourth Proportional to 172,600.77, 258,936.45 and 72,760.98

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Solution

The fourth proportional to 172,600.77, 258,936.45 and 72,760.98 is: 109,156.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,600.77 : 258,936.45 = 72,760.98 : x
  2. Step 2: Convert to fraction form
    172,600.77/258,936.45 = 72,760.98/x
  3. Step 3: Cross multiply
    172,600.77x = 258,936.45 × 72,760.98
  4. Step 4: Simplify right side
    172,600.77x = 18,840,469,859.72
  5. Step 5: Solve for x
    x = 18,840,469,859.72/172,600.77
  6. Step 6: Final answer
    x = 109,156.35

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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.