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Finding the Fourth Proportional to 172,987.73, 259,516.61 and 73,147.76

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Solution

The fourth proportional to 172,987.73, 259,516.61 and 73,147.76 is: 109,736.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,987.73 : 259,516.61 = 73,147.76 : x
  2. Step 2: Convert to fraction form
    172,987.73/259,516.61 = 73,147.76/x
  3. Step 3: Cross multiply
    172,987.73x = 259,516.61 × 73,147.76
  4. Step 4: Simplify right side
    172,987.73x = 18,983,057,589.58
  5. Step 5: Solve for x
    x = 18,983,057,589.58/172,987.73
  6. Step 6: Final answer
    x = 109,736.44

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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.