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Finding the Fourth Proportional to 87,388, 131,082.48 and 21,724

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Solution

The fourth proportional to 87,388, 131,082.48 and 21,724 is: 32,586.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,388 : 131,082.48 = 21,724 : x
  2. Step 2: Convert to fraction form
    87,388/131,082.48 = 21,724/x
  3. Step 3: Cross multiply
    87,388x = 131,082.48 × 21,724
  4. Step 4: Simplify right side
    87,388x = 2,847,635,795.52
  5. Step 5: Solve for x
    x = 2,847,635,795.52/87,388
  6. Step 6: Final answer
    x = 32,586.12

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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.