Home / 138,808.09-191,540.97-80,655.76

Finding the Fourth Proportional to 138,808.09, 191,540.97 and 80,655.76

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Solution

The fourth proportional to 138,808.09, 191,540.97 and 80,655.76 is: 111,296.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.09 : 191,540.97 = 80,655.76 : x
  2. Step 2: Convert to fraction form
    138,808.09/191,540.97 = 80,655.76/x
  3. Step 3: Cross multiply
    138,808.09x = 191,540.97 × 80,655.76
  4. Step 4: Simplify right side
    138,808.09x = 15,448,882,506.49
  5. Step 5: Solve for x
    x = 15,448,882,506.49/138,808.09
  6. Step 6: Final answer
    x = 111,296.70

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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.