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Finding the Fourth Proportional to 80,364.82, 120,540.93 and 30,440.38

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Solution

The fourth proportional to 80,364.82, 120,540.93 and 30,440.38 is: 45,658.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,364.82 : 120,540.93 = 30,440.38 : x
  2. Step 2: Convert to fraction form
    80,364.82/120,540.93 = 30,440.38/x
  3. Step 3: Cross multiply
    80,364.82x = 120,540.93 × 30,440.38
  4. Step 4: Simplify right side
    80,364.82x = 3,669,311,714.75
  5. Step 5: Solve for x
    x = 3,669,311,714.75/80,364.82
  6. Step 6: Final answer
    x = 45,658.18

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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.