Home / 100,338.27-138,352.28-80,181.33

Finding the Fourth Proportional to 100,338.27, 138,352.28 and 80,181.33

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Solution

The fourth proportional to 100,338.27, 138,352.28 and 80,181.33 is: 110,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,338.27 : 138,352.28 = 80,181.33 : x
  2. Step 2: Convert to fraction form
    100,338.27/138,352.28 = 80,181.33/x
  3. Step 3: Cross multiply
    100,338.27x = 138,352.28 × 80,181.33
  4. Step 4: Simplify right side
    100,338.27x = 11,093,269,418.03
  5. Step 5: Solve for x
    x = 11,093,269,418.03/100,338.27
  6. Step 6: Final answer
    x = 110,558.71

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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.