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Finding the Fourth Proportional to 87,589, 131,383.50 and 21,925

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Solution

The fourth proportional to 87,589, 131,383.50 and 21,925 is: 32,887.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,589 : 131,383.50 = 21,925 : x
  2. Step 2: Convert to fraction form
    87,589/131,383.50 = 21,925/x
  3. Step 3: Cross multiply
    87,589x = 131,383.50 × 21,925
  4. Step 4: Simplify right side
    87,589x = 2,880,583,237.50
  5. Step 5: Solve for x
    x = 2,880,583,237.50/87,589
  6. Step 6: Final answer
    x = 32,887.50

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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.