Home / 87,255.43-120,409.31-53,320.71

Finding the Fourth Proportional to 87,255.43, 120,409.31 and 53,320.71

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Solution

The fourth proportional to 87,255.43, 120,409.31 and 53,320.71 is: 73,580.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,255.43 : 120,409.31 = 53,320.71 : x
  2. Step 2: Convert to fraction form
    87,255.43/120,409.31 = 53,320.71/x
  3. Step 3: Cross multiply
    87,255.43x = 120,409.31 × 53,320.71
  4. Step 4: Simplify right side
    87,255.43x = 6,420,309,318.73
  5. Step 5: Solve for x
    x = 6,420,309,318.73/87,255.43
  6. Step 6: Final answer
    x = 73,580.63

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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.