Home / 120,150.36-180,107.82-66,867.78

Finding the Fourth Proportional to 120,150.36, 180,107.82 and 66,867.78

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Solution

The fourth proportional to 120,150.36, 180,107.82 and 66,867.78 is: 100,236.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,150.36 : 180,107.82 = 66,867.78 : x
  2. Step 2: Convert to fraction form
    120,150.36/180,107.82 = 66,867.78/x
  3. Step 3: Cross multiply
    120,150.36x = 180,107.82 × 66,867.78
  4. Step 4: Simplify right side
    120,150.36x = 12,043,410,084.04
  5. Step 5: Solve for x
    x = 12,043,410,084.04/120,150.36
  6. Step 6: Final answer
    x = 100,236.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.