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Finding the Fourth Proportional to 80,249.64, 120,392.70 and 42,789.96

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Solution

The fourth proportional to 80,249.64, 120,392.70 and 42,789.96 is: 64,194.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,249.64 : 120,392.70 = 42,789.96 : x
  2. Step 2: Convert to fraction form
    80,249.64/120,392.70 = 42,789.96/x
  3. Step 3: Cross multiply
    80,249.64x = 120,392.70 × 42,789.96
  4. Step 4: Simplify right side
    80,249.64x = 5,151,598,817.29
  5. Step 5: Solve for x
    x = 5,151,598,817.29/80,249.64
  6. Step 6: Final answer
    x = 64,194.67

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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.