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Finding the Fourth Proportional to 80,755.84, 121,099.20 and 28,149.76

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Solution

The fourth proportional to 80,755.84, 121,099.20 and 28,149.76 is: 42,212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,755.84 : 121,099.20 = 28,149.76 : x
  2. Step 2: Convert to fraction form
    80,755.84/121,099.20 = 28,149.76/x
  3. Step 3: Cross multiply
    80,755.84x = 121,099.20 × 28,149.76
  4. Step 4: Simplify right side
    80,755.84x = 3,408,913,416.19
  5. Step 5: Solve for x
    x = 3,408,913,416.19/80,755.84
  6. Step 6: Final answer
    x = 42,212.59

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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.