Home / 100,217.17-138,261.19-57,199.05

Finding the Fourth Proportional to 100,217.17, 138,261.19 and 57,199.05

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Solution

The fourth proportional to 100,217.17, 138,261.19 and 57,199.05 is: 78,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,217.17 : 138,261.19 = 57,199.05 : x
  2. Step 2: Convert to fraction form
    100,217.17/138,261.19 = 57,199.05/x
  3. Step 3: Cross multiply
    100,217.17x = 138,261.19 × 57,199.05
  4. Step 4: Simplify right side
    100,217.17x = 7,908,408,028.56
  5. Step 5: Solve for x
    x = 7,908,408,028.56/100,217.17
  6. Step 6: Final answer
    x = 78,912.71

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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.