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Finding the Fourth Proportional to 172,179.92, 258,347.74 and 87,896.58

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Solution

The fourth proportional to 172,179.92, 258,347.74 and 87,896.58 is: 131,884.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,179.92 : 258,347.74 = 87,896.58 : x
  2. Step 2: Convert to fraction form
    172,179.92/258,347.74 = 87,896.58/x
  3. Step 3: Cross multiply
    172,179.92x = 258,347.74 × 87,896.58
  4. Step 4: Simplify right side
    172,179.92x = 22,707,882,796.73
  5. Step 5: Solve for x
    x = 22,707,882,796.73/172,179.92
  6. Step 6: Final answer
    x = 131,884.62

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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.