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Finding the Fourth Proportional to 87,529, 131,293.66 and 21,865

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Solution

The fourth proportional to 87,529, 131,293.66 and 21,865 is: 32,797.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,529 : 131,293.66 = 21,865 : x
  2. Step 2: Convert to fraction form
    87,529/131,293.66 = 21,865/x
  3. Step 3: Cross multiply
    87,529x = 131,293.66 × 21,865
  4. Step 4: Simplify right side
    87,529x = 2,870,735,875.90
  5. Step 5: Solve for x
    x = 2,870,735,875.90/87,529
  6. Step 6: Final answer
    x = 32,797.54

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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.