Home / 138,910.68-191,651.76-85,168.80

Finding the Fourth Proportional to 138,910.68, 191,651.76 and 85,168.80

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Solution

The fourth proportional to 138,910.68, 191,651.76 and 85,168.80 is: 117,505.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,910.68 : 191,651.76 = 85,168.80 : x
  2. Step 2: Convert to fraction form
    138,910.68/191,651.76 = 85,168.80/x
  3. Step 3: Cross multiply
    138,910.68x = 191,651.76 × 85,168.80
  4. Step 4: Simplify right side
    138,910.68x = 16,322,750,417.09
  5. Step 5: Solve for x
    x = 16,322,750,417.09/138,910.68
  6. Step 6: Final answer
    x = 117,505.37

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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.