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Finding the Fourth Proportional to 87,872.91, 121,264.68 and 47,586.72

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Solution

The fourth proportional to 87,872.91, 121,264.68 and 47,586.72 is: 65,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,872.91 : 121,264.68 = 47,586.72 : x
  2. Step 2: Convert to fraction form
    87,872.91/121,264.68 = 47,586.72/x
  3. Step 3: Cross multiply
    87,872.91x = 121,264.68 × 47,586.72
  4. Step 4: Simplify right side
    87,872.91x = 5,770,588,373.05
  5. Step 5: Solve for x
    x = 5,770,588,373.05/87,872.91
  6. Step 6: Final answer
    x = 65,669.71

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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.