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Finding the Fourth Proportional to 87,369, 120,571.78 and 49,644.84

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Solution

The fourth proportional to 87,369, 120,571.78 and 49,644.84 is: 68,511.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,369 : 120,571.78 = 49,644.84 : x
  2. Step 2: Convert to fraction form
    87,369/120,571.78 = 49,644.84/x
  3. Step 3: Cross multiply
    87,369x = 120,571.78 × 49,644.84
  4. Step 4: Simplify right side
    87,369x = 5,985,766,726.62
  5. Step 5: Solve for x
    x = 5,985,766,726.62/87,369
  6. Step 6: Final answer
    x = 68,511.33

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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.