Home / 87,992.11-120,979.49-78,340.15

Finding the Fourth Proportional to 87,992.11, 120,979.49 and 78,340.15

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Solution

The fourth proportional to 87,992.11, 120,979.49 and 78,340.15 is: 107,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,992.11 : 120,979.49 = 78,340.15 : x
  2. Step 2: Convert to fraction form
    87,992.11/120,979.49 = 78,340.15/x
  3. Step 3: Cross multiply
    87,992.11x = 120,979.49 × 78,340.15
  4. Step 4: Simplify right side
    87,992.11x = 9,477,551,393.52
  5. Step 5: Solve for x
    x = 9,477,551,393.52/87,992.11
  6. Step 6: Final answer
    x = 107,709.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.