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Finding the Fourth Proportional to 172,115.20, 258,245.70 and 108,983.80

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Solution

The fourth proportional to 172,115.20, 258,245.70 and 108,983.80 is: 163,521.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,115.20 : 258,245.70 = 108,983.80 : x
  2. Step 2: Convert to fraction form
    172,115.20/258,245.70 = 108,983.80/x
  3. Step 3: Cross multiply
    172,115.20x = 258,245.70 × 108,983.80
  4. Step 4: Simplify right side
    172,115.20x = 28,144,597,719.66
  5. Step 5: Solve for x
    x = 28,144,597,719.66/172,115.20
  6. Step 6: Final answer
    x = 163,521.86

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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.