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Finding the Fourth Proportional to 120,427.60, 180,468.60 and 88,589.20

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Solution

The fourth proportional to 120,427.60, 180,468.60 and 88,589.20 is: 132,756.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,427.60 : 180,468.60 = 88,589.20 : x
  2. Step 2: Convert to fraction form
    120,427.60/180,468.60 = 88,589.20/x
  3. Step 3: Cross multiply
    120,427.60x = 180,468.60 × 88,589.20
  4. Step 4: Simplify right side
    120,427.60x = 15,987,568,899.12
  5. Step 5: Solve for x
    x = 15,987,568,899.12/120,427.60
  6. Step 6: Final answer
    x = 132,756.68

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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.