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Finding the Fourth Proportional to 135,379.72, 186,797.46 and 85,049.56

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Solution

The fourth proportional to 135,379.72, 186,797.46 and 85,049.56 is: 117,351.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,379.72 : 186,797.46 = 85,049.56 : x
  2. Step 2: Convert to fraction form
    135,379.72/186,797.46 = 85,049.56/x
  3. Step 3: Cross multiply
    135,379.72x = 186,797.46 × 85,049.56
  4. Step 4: Simplify right side
    135,379.72x = 15,887,041,782.12
  5. Step 5: Solve for x
    x = 15,887,041,782.12/135,379.72
  6. Step 6: Final answer
    x = 117,351.71

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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.