Home / 138,906.37-191,651.91-87,229.05

Finding the Fourth Proportional to 138,906.37, 191,651.91 and 87,229.05

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Solution

The fourth proportional to 138,906.37, 191,651.91 and 87,229.05 is: 120,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,906.37 : 191,651.91 = 87,229.05 : x
  2. Step 2: Convert to fraction form
    138,906.37/191,651.91 = 87,229.05/x
  3. Step 3: Cross multiply
    138,906.37x = 191,651.91 × 87,229.05
  4. Step 4: Simplify right side
    138,906.37x = 16,717,614,039.99
  5. Step 5: Solve for x
    x = 16,717,614,039.99/138,906.37
  6. Step 6: Final answer
    x = 120,351.67

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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.