Home / 100,186.42-138,256.26-54,245.84

Finding the Fourth Proportional to 100,186.42, 138,256.26 and 54,245.84

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Solution

The fourth proportional to 100,186.42, 138,256.26 and 54,245.84 is: 74,858.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,186.42 : 138,256.26 = 54,245.84 : x
  2. Step 2: Convert to fraction form
    100,186.42/138,256.26 = 54,245.84/x
  3. Step 3: Cross multiply
    100,186.42x = 138,256.26 × 54,245.84
  4. Step 4: Simplify right side
    100,186.42x = 7,499,826,267.68
  5. Step 5: Solve for x
    x = 7,499,826,267.68/100,186.42
  6. Step 6: Final answer
    x = 74,858.71

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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.