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Finding the Fourth Proportional to 80,490.80, 120,736.16 and 27,900.24

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Solution

The fourth proportional to 80,490.80, 120,736.16 and 27,900.24 is: 41,850.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,490.80 : 120,736.16 = 27,900.24 : x
  2. Step 2: Convert to fraction form
    80,490.80/120,736.16 = 27,900.24/x
  3. Step 3: Cross multiply
    80,490.80x = 120,736.16 × 27,900.24
  4. Step 4: Simplify right side
    80,490.80x = 3,368,567,840.68
  5. Step 5: Solve for x
    x = 3,368,567,840.68/80,490.80
  6. Step 6: Final answer
    x = 41,850.35

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Similar ratio
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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.