Home / 138,778.56-191,519.05-85,053.19

Finding the Fourth Proportional to 138,778.56, 191,519.05 and 85,053.19

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Solution

The fourth proportional to 138,778.56, 191,519.05 and 85,053.19 is: 117,376.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,778.56 : 191,519.05 = 85,053.19 : x
  2. Step 2: Convert to fraction form
    138,778.56/191,519.05 = 85,053.19/x
  3. Step 3: Cross multiply
    138,778.56x = 191,519.05 × 85,053.19
  4. Step 4: Simplify right side
    138,778.56x = 16,289,306,148.27
  5. Step 5: Solve for x
    x = 16,289,306,148.27/138,778.56
  6. Step 6: Final answer
    x = 117,376.24

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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.