Home / 100,500.58-138,691.38-55,180.54

Finding the Fourth Proportional to 100,500.58, 138,691.38 and 55,180.54

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Solution

The fourth proportional to 100,500.58, 138,691.38 and 55,180.54 is: 76,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,500.58 : 138,691.38 = 55,180.54 : x
  2. Step 2: Convert to fraction form
    100,500.58/138,691.38 = 55,180.54/x
  3. Step 3: Cross multiply
    100,500.58x = 138,691.38 × 55,180.54
  4. Step 4: Simplify right side
    100,500.58x = 7,653,065,241.75
  5. Step 5: Solve for x
    x = 7,653,065,241.75/100,500.58
  6. Step 6: Final answer
    x = 76,149.46

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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.