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Finding the Fourth Proportional to 68,156.68, 102,200.46 and 31,189

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Solution

The fourth proportional to 68,156.68, 102,200.46 and 31,189 is: 46,767.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,156.68 : 102,200.46 = 31,189 : x
  2. Step 2: Convert to fraction form
    68,156.68/102,200.46 = 31,189/x
  3. Step 3: Cross multiply
    68,156.68x = 102,200.46 × 31,189
  4. Step 4: Simplify right side
    68,156.68x = 3,187,530,146.94
  5. Step 5: Solve for x
    x = 3,187,530,146.94/68,156.68
  6. Step 6: Final answer
    x = 46,767.69

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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.