Home / 87,078.20-120,169.28-50,778.68

Finding the Fourth Proportional to 87,078.20, 120,169.28 and 50,778.68

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Solution

The fourth proportional to 87,078.20, 120,169.28 and 50,778.68 is: 70,075.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,078.20 : 120,169.28 = 50,778.68 : x
  2. Step 2: Convert to fraction form
    87,078.20/120,169.28 = 50,778.68/x
  3. Step 3: Cross multiply
    87,078.20x = 120,169.28 × 50,778.68
  4. Step 4: Simplify right side
    87,078.20x = 6,102,037,414.95
  5. Step 5: Solve for x
    x = 6,102,037,414.95/87,078.20
  6. Step 6: Final answer
    x = 70,075.37

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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.