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Finding the Fourth Proportional to 100,375.11, 138,519.42 and 55,052.67

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Solution

The fourth proportional to 100,375.11, 138,519.42 and 55,052.67 is: 75,973.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,375.11 : 138,519.42 = 55,052.67 : x
  2. Step 2: Convert to fraction form
    100,375.11/138,519.42 = 55,052.67/x
  3. Step 3: Cross multiply
    100,375.11x = 138,519.42 × 55,052.67
  4. Step 4: Simplify right side
    100,375.11x = 7,625,863,917.85
  5. Step 5: Solve for x
    x = 7,625,863,917.85/100,375.11
  6. Step 6: Final answer
    x = 75,973.65

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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.