Home / 138,778.11-191,514.38-82,185.84

Finding the Fourth Proportional to 138,778.11, 191,514.38 and 82,185.84

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Solution

The fourth proportional to 138,778.11, 191,514.38 and 82,185.84 is: 113,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,778.11 : 191,514.38 = 82,185.84 : x
  2. Step 2: Convert to fraction form
    138,778.11/191,514.38 = 82,185.84/x
  3. Step 3: Cross multiply
    138,778.11x = 191,514.38 × 82,185.84
  4. Step 4: Simplify right side
    138,778.11x = 15,739,769,781.45
  5. Step 5: Solve for x
    x = 15,739,769,781.45/138,778.11
  6. Step 6: Final answer
    x = 113,416.80

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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.