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Finding the Fourth Proportional to 87,891.90, 121,288.22 and 49,653.24

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Solution

The fourth proportional to 87,891.90, 121,288.22 and 49,653.24 is: 68,520.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,891.90 : 121,288.22 = 49,653.24 : x
  2. Step 2: Convert to fraction form
    87,891.90/121,288.22 = 49,653.24/x
  3. Step 3: Cross multiply
    87,891.90x = 121,288.22 × 49,653.24
  4. Step 4: Simplify right side
    87,891.90x = 6,022,353,096.83
  5. Step 5: Solve for x
    x = 6,022,353,096.83/87,891.90
  6. Step 6: Final answer
    x = 68,520.00

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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.