Home / 128,331.09-192,019.87-80,723.88

Finding the Fourth Proportional to 128,331.09, 192,019.87 and 80,723.88

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Solution

The fourth proportional to 128,331.09, 192,019.87 and 80,723.88 is: 120,785.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,331.09 : 192,019.87 = 80,723.88 : x
  2. Step 2: Convert to fraction form
    128,331.09/192,019.87 = 80,723.88/x
  3. Step 3: Cross multiply
    128,331.09x = 192,019.87 × 80,723.88
  4. Step 4: Simplify right side
    128,331.09x = 15,500,588,943.50
  5. Step 5: Solve for x
    x = 15,500,588,943.50/128,331.09
  6. Step 6: Final answer
    x = 120,785.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.