Home / 100,682.28-138,944.20-54,745.04

Finding the Fourth Proportional to 100,682.28, 138,944.20 and 54,745.04

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Solution

The fourth proportional to 100,682.28, 138,944.20 and 54,745.04 is: 75,549.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,682.28 : 138,944.20 = 54,745.04 : x
  2. Step 2: Convert to fraction form
    100,682.28/138,944.20 = 54,745.04/x
  3. Step 3: Cross multiply
    100,682.28x = 138,944.20 × 54,745.04
  4. Step 4: Simplify right side
    100,682.28x = 7,606,505,786.77
  5. Step 5: Solve for x
    x = 7,606,505,786.77/100,682.28
  6. Step 6: Final answer
    x = 75,549.60

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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.