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Finding the Fourth Proportional to 80,271.30, 120,408.30 and 30,374.90

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Solution

The fourth proportional to 80,271.30, 120,408.30 and 30,374.90 is: 45,562.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,271.30 : 120,408.30 = 30,374.90 : x
  2. Step 2: Convert to fraction form
    80,271.30/120,408.30 = 30,374.90/x
  3. Step 3: Cross multiply
    80,271.30x = 120,408.30 × 30,374.90
  4. Step 4: Simplify right side
    80,271.30x = 3,657,389,469.63
  5. Step 5: Solve for x
    x = 3,657,389,469.63/80,271.30
  6. Step 6: Final answer
    x = 45,562.85

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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.