Home / 80,118.60-120,249.21-42,709.56

Finding the Fourth Proportional to 80,118.60, 120,249.21 and 42,709.56

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Solution

The fourth proportional to 80,118.60, 120,249.21 and 42,709.56 is: 64,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,118.60 : 120,249.21 = 42,709.56 : x
  2. Step 2: Convert to fraction form
    80,118.60/120,249.21 = 42,709.56/x
  3. Step 3: Cross multiply
    80,118.60x = 120,249.21 × 42,709.56
  4. Step 4: Simplify right side
    80,118.60x = 5,135,790,849.45
  5. Step 5: Solve for x
    x = 5,135,790,849.45/80,118.60
  6. Step 6: Final answer
    x = 64,102.35

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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.