Home / 138,779.11-191,515.76-82,186.84

Finding the Fourth Proportional to 138,779.11, 191,515.76 and 82,186.84

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Solution

The fourth proportional to 138,779.11, 191,515.76 and 82,186.84 is: 113,418.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.11 : 191,515.76 = 82,186.84 : x
  2. Step 2: Convert to fraction form
    138,779.11/191,515.76 = 82,186.84/x
  3. Step 3: Cross multiply
    138,779.11x = 191,515.76 × 82,186.84
  4. Step 4: Simplify right side
    138,779.11x = 15,740,074,713.66
  5. Step 5: Solve for x
    x = 15,740,074,713.66/138,779.11
  6. Step 6: Final answer
    x = 113,418.18

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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.