Home / 87,198.69-120,338.18-51,390.21

Finding the Fourth Proportional to 87,198.69, 120,338.18 and 51,390.21

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Solution

The fourth proportional to 87,198.69, 120,338.18 and 51,390.21 is: 70,920.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,198.69 : 120,338.18 = 51,390.21 : x
  2. Step 2: Convert to fraction form
    87,198.69/120,338.18 = 51,390.21/x
  3. Step 3: Cross multiply
    87,198.69x = 120,338.18 × 51,390.21
  4. Step 4: Simplify right side
    87,198.69x = 6,184,204,084.27
  5. Step 5: Solve for x
    x = 6,184,204,084.27/87,198.69
  6. Step 6: Final answer
    x = 70,920.84

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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.