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Finding the Fourth Proportional to 87,958.65, 121,382.86 and 47,672.43

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Solution

The fourth proportional to 87,958.65, 121,382.86 and 47,672.43 is: 65,787.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,958.65 : 121,382.86 = 47,672.43 : x
  2. Step 2: Convert to fraction form
    87,958.65/121,382.86 = 47,672.43/x
  3. Step 3: Cross multiply
    87,958.65x = 121,382.86 × 47,672.43
  4. Step 4: Simplify right side
    87,958.65x = 5,786,615,896.55
  5. Step 5: Solve for x
    x = 5,786,615,896.55/87,958.65
  6. Step 6: Final answer
    x = 65,787.91

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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.