Home / 87,865.20-121,252.46-47,578.64

Finding the Fourth Proportional to 87,865.20, 121,252.46 and 47,578.64

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Solution

The fourth proportional to 87,865.20, 121,252.46 and 47,578.64 is: 65,657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,865.20 : 121,252.46 = 47,578.64 : x
  2. Step 2: Convert to fraction form
    87,865.20/121,252.46 = 47,578.64/x
  3. Step 3: Cross multiply
    87,865.20x = 121,252.46 × 47,578.64
  4. Step 4: Simplify right side
    87,865.20x = 5,769,026,299.30
  5. Step 5: Solve for x
    x = 5,769,026,299.30/87,865.20
  6. Step 6: Final answer
    x = 65,657.69

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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.