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Finding the Fourth Proportional to 80,451.88, 120,697.72 and 56,805.76

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Solution

The fourth proportional to 80,451.88, 120,697.72 and 56,805.76 is: 85,222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,451.88 : 120,697.72 = 56,805.76 : x
  2. Step 2: Convert to fraction form
    80,451.88/120,697.72 = 56,805.76/x
  3. Step 3: Cross multiply
    80,451.88x = 120,697.72 × 56,805.76
  4. Step 4: Simplify right side
    80,451.88x = 6,856,324,827.35
  5. Step 5: Solve for x
    x = 6,856,324,827.35/80,451.88
  6. Step 6: Final answer
    x = 85,222.68

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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.