Home / 87,664.26-120,947.13-49,911.78

Finding the Fourth Proportional to 87,664.26, 120,947.13 and 49,911.78

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Solution

The fourth proportional to 87,664.26, 120,947.13 and 49,911.78 is: 68,861.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,664.26 : 120,947.13 = 49,911.78 : x
  2. Step 2: Convert to fraction form
    87,664.26/120,947.13 = 49,911.78/x
  3. Step 3: Cross multiply
    87,664.26x = 120,947.13 × 49,911.78
  4. Step 4: Simplify right side
    87,664.26x = 6,036,686,544.19
  5. Step 5: Solve for x
    x = 6,036,686,544.19/87,664.26
  6. Step 6: Final answer
    x = 68,861.43

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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.