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Finding the Fourth Proportional to 87,855.78, 121,240.46 and 47,568.71

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Solution

The fourth proportional to 87,855.78, 121,240.46 and 47,568.71 is: 65,644.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,855.78 : 121,240.46 = 47,568.71 : x
  2. Step 2: Convert to fraction form
    87,855.78/121,240.46 = 47,568.71/x
  3. Step 3: Cross multiply
    87,855.78x = 121,240.46 × 47,568.71
  4. Step 4: Simplify right side
    87,855.78x = 5,767,251,675.80
  5. Step 5: Solve for x
    x = 5,767,251,675.80/87,855.78
  6. Step 6: Final answer
    x = 65,644.54

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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.