Home / 87,057.90-120,118.92-55,215.18

Finding the Fourth Proportional to 87,057.90, 120,118.92 and 55,215.18

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Solution

The fourth proportional to 87,057.90, 120,118.92 and 55,215.18 is: 76,183.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,057.90 : 120,118.92 = 55,215.18 : x
  2. Step 2: Convert to fraction form
    87,057.90/120,118.92 = 55,215.18/x
  3. Step 3: Cross multiply
    87,057.90x = 120,118.92 × 55,215.18
  4. Step 4: Simplify right side
    87,057.90x = 6,632,387,789.21
  5. Step 5: Solve for x
    x = 6,632,387,789.21/87,057.90
  6. Step 6: Final answer
    x = 76,183.64

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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.