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Finding the Fourth Proportional to 80,072.40, 120,111.12 and 27,481.20

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Solution

The fourth proportional to 80,072.40, 120,111.12 and 27,481.20 is: 41,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,072.40 : 120,111.12 = 27,481.20 : x
  2. Step 2: Convert to fraction form
    80,072.40/120,111.12 = 27,481.20/x
  3. Step 3: Cross multiply
    80,072.40x = 120,111.12 × 27,481.20
  4. Step 4: Simplify right side
    80,072.40x = 3,300,797,710.94
  5. Step 5: Solve for x
    x = 3,300,797,710.94/80,072.40
  6. Step 6: Final answer
    x = 41,222.66

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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.