Home / 87,086.09-120,189.92-51,279.42

Finding the Fourth Proportional to 87,086.09, 120,189.92 and 51,279.42

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Solution

The fourth proportional to 87,086.09, 120,189.92 and 51,279.42 is: 70,772.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,086.09 : 120,189.92 = 51,279.42 : x
  2. Step 2: Convert to fraction form
    87,086.09/120,189.92 = 51,279.42/x
  3. Step 3: Cross multiply
    87,086.09x = 120,189.92 × 51,279.42
  4. Step 4: Simplify right side
    87,086.09x = 6,163,269,387.45
  5. Step 5: Solve for x
    x = 6,163,269,387.45/87,086.09
  6. Step 6: Final answer
    x = 70,772.14

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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.