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Finding the Fourth Proportional to 172,382.55, 258,093.90 and 87,960.30

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Solution

The fourth proportional to 172,382.55, 258,093.90 and 87,960.30 is: 131,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,382.55 : 258,093.90 = 87,960.30 : x
  2. Step 2: Convert to fraction form
    172,382.55/258,093.90 = 87,960.30/x
  3. Step 3: Cross multiply
    172,382.55x = 258,093.90 × 87,960.30
  4. Step 4: Simplify right side
    172,382.55x = 22,702,016,872.17
  5. Step 5: Solve for x
    x = 22,702,016,872.17/172,382.55
  6. Step 6: Final answer
    x = 131,695.56

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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.