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Finding the Fourth Proportional to 80,408.52, 120,479.85 and 27,788.76

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Solution

The fourth proportional to 80,408.52, 120,479.85 and 27,788.76 is: 41,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,408.52 : 120,479.85 = 27,788.76 : x
  2. Step 2: Convert to fraction form
    80,408.52/120,479.85 = 27,788.76/x
  3. Step 3: Cross multiply
    80,408.52x = 120,479.85 × 27,788.76
  4. Step 4: Simplify right side
    80,408.52x = 3,347,985,636.49
  5. Step 5: Solve for x
    x = 3,347,985,636.49/80,408.52
  6. Step 6: Final answer
    x = 41,637.20

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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.