Home / 100,231.26-138,319.20-54,910.90

Finding the Fourth Proportional to 100,231.26, 138,319.20 and 54,910.90

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Solution

The fourth proportional to 100,231.26, 138,319.20 and 54,910.90 is: 75,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,231.26 : 138,319.20 = 54,910.90 : x
  2. Step 2: Convert to fraction form
    100,231.26/138,319.20 = 54,910.90/x
  3. Step 3: Cross multiply
    100,231.26x = 138,319.20 × 54,910.90
  4. Step 4: Simplify right side
    100,231.26x = 7,595,231,759.28
  5. Step 5: Solve for x
    x = 7,595,231,759.28/100,231.26
  6. Step 6: Final answer
    x = 75,777.08

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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.