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Finding the Fourth Proportional to 87,230.94, 131,439.94 and 71,782.44

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Solution

The fourth proportional to 87,230.94, 131,439.94 and 71,782.44 is: 108,162.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,230.94 : 131,439.94 = 71,782.44 : x
  2. Step 2: Convert to fraction form
    87,230.94/131,439.94 = 71,782.44/x
  3. Step 3: Cross multiply
    87,230.94x = 131,439.94 × 71,782.44
  4. Step 4: Simplify right side
    87,230.94x = 9,435,079,606.65
  5. Step 5: Solve for x
    x = 9,435,079,606.65/87,230.94
  6. Step 6: Final answer
    x = 108,162.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.