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Finding the Fourth Proportional to 80,492.45, 120,738.67 and 30,572.42

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Solution

The fourth proportional to 80,492.45, 120,738.67 and 30,572.42 is: 45,858.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,492.45 : 120,738.67 = 30,572.42 : x
  2. Step 2: Convert to fraction form
    80,492.45/120,738.67 = 30,572.42/x
  3. Step 3: Cross multiply
    80,492.45x = 120,738.67 × 30,572.42
  4. Step 4: Simplify right side
    80,492.45x = 3,691,273,592.89
  5. Step 5: Solve for x
    x = 3,691,273,592.89/80,492.45
  6. Step 6: Final answer
    x = 45,858.63

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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.