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Finding the Fourth Proportional to 87,893.05, 121,299.87 and 49,659.61

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Solution

The fourth proportional to 87,893.05, 121,299.87 and 49,659.61 is: 68,534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,893.05 : 121,299.87 = 49,659.61 : x
  2. Step 2: Convert to fraction form
    87,893.05/121,299.87 = 49,659.61/x
  3. Step 3: Cross multiply
    87,893.05x = 121,299.87 × 49,659.61
  4. Step 4: Simplify right side
    87,893.05x = 6,023,704,237.25
  5. Step 5: Solve for x
    x = 6,023,704,237.25/87,893.05
  6. Step 6: Final answer
    x = 68,534.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.