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Finding the Fourth Proportional to 87,889.62, 131,833.44 and 21,330.48

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Solution

The fourth proportional to 87,889.62, 131,833.44 and 21,330.48 is: 31,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,889.62 : 131,833.44 = 21,330.48 : x
  2. Step 2: Convert to fraction form
    87,889.62/131,833.44 = 21,330.48/x
  3. Step 3: Cross multiply
    87,889.62x = 131,833.44 × 21,330.48
  4. Step 4: Simplify right side
    87,889.62x = 2,812,070,555.25
  5. Step 5: Solve for x
    x = 2,812,070,555.25/87,889.62
  6. Step 6: Final answer
    x = 31,995.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.