Home / 87,720.82-131,580.08-21,160.48

Finding the Fourth Proportional to 87,720.82, 131,580.08 and 21,160.48

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Solution

The fourth proportional to 87,720.82, 131,580.08 and 21,160.48 is: 31,740.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,720.82 : 131,580.08 = 21,160.48 : x
  2. Step 2: Convert to fraction form
    87,720.82/131,580.08 = 21,160.48/x
  3. Step 3: Cross multiply
    87,720.82x = 131,580.08 × 21,160.48
  4. Step 4: Simplify right side
    87,720.82x = 2,784,297,651.24
  5. Step 5: Solve for x
    x = 2,784,297,651.24/87,720.82
  6. Step 6: Final answer
    x = 31,740.44

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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.