Home / 87,958.85-131,938.38-21,398.98

Finding the Fourth Proportional to 87,958.85, 131,938.38 and 21,398.98

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Solution

The fourth proportional to 87,958.85, 131,938.38 and 21,398.98 is: 32,098.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,958.85 : 131,938.38 = 21,398.98 : x
  2. Step 2: Convert to fraction form
    87,958.85/131,938.38 = 21,398.98/x
  3. Step 3: Cross multiply
    87,958.85x = 131,938.38 × 21,398.98
  4. Step 4: Simplify right side
    87,958.85x = 2,823,347,168.20
  5. Step 5: Solve for x
    x = 2,823,347,168.20/87,958.85
  6. Step 6: Final answer
    x = 32,098.50

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1.5x scale

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.