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Finding the Fourth Proportional to 80,122.56, 120,174.66 and 20,963.94

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Solution

The fourth proportional to 80,122.56, 120,174.66 and 20,963.94 is: 31,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,122.56 : 120,174.66 = 20,963.94 : x
  2. Step 2: Convert to fraction form
    80,122.56/120,174.66 = 20,963.94/x
  3. Step 3: Cross multiply
    80,122.56x = 120,174.66 × 20,963.94
  4. Step 4: Simplify right side
    80,122.56x = 2,519,334,361.76
  5. Step 5: Solve for x
    x = 2,519,334,361.76/80,122.56
  6. Step 6: Final answer
    x = 31,443.51

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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.