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Finding the Fourth Proportional to 87,469.88, 120,723.01 and 66,212.24

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Solution

The fourth proportional to 87,469.88, 120,723.01 and 66,212.24 is: 91,383.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,469.88 : 120,723.01 = 66,212.24 : x
  2. Step 2: Convert to fraction form
    87,469.88/120,723.01 = 66,212.24/x
  3. Step 3: Cross multiply
    87,469.88x = 120,723.01 × 66,212.24
  4. Step 4: Simplify right side
    87,469.88x = 7,993,340,142.50
  5. Step 5: Solve for x
    x = 7,993,340,142.50/87,469.88
  6. Step 6: Final answer
    x = 91,383.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.