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Finding the Fourth Proportional to 87,722.82, 120,947.81 and 73,207.94

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Solution

The fourth proportional to 87,722.82, 120,947.81 and 73,207.94 is: 100,935.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,722.82 : 120,947.81 = 73,207.94 : x
  2. Step 2: Convert to fraction form
    87,722.82/120,947.81 = 73,207.94/x
  3. Step 3: Cross multiply
    87,722.82x = 120,947.81 × 73,207.94
  4. Step 4: Simplify right side
    87,722.82x = 8,854,339,046.83
  5. Step 5: Solve for x
    x = 8,854,339,046.83/87,722.82
  6. Step 6: Final answer
    x = 100,935.41

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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.