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Finding the Fourth Proportional to 80,505.16, 120,777.18 and 27,913.48

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Solution

The fourth proportional to 80,505.16, 120,777.18 and 27,913.48 is: 41,876.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,505.16 : 120,777.18 = 27,913.48 : x
  2. Step 2: Convert to fraction form
    80,505.16/120,777.18 = 27,913.48/x
  3. Step 3: Cross multiply
    80,505.16x = 120,777.18 × 27,913.48
  4. Step 4: Simplify right side
    80,505.16x = 3,371,311,398.39
  5. Step 5: Solve for x
    x = 3,371,311,398.39/80,505.16
  6. Step 6: Final answer
    x = 41,876.96

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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.