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Finding the Fourth Proportional to 53,998.80, 80,998.20 and 30,379.20

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Solution

The fourth proportional to 53,998.80, 80,998.20 and 30,379.20 is: 45,568.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,998.80 : 80,998.20 = 30,379.20 : x
  2. Step 2: Convert to fraction form
    53,998.80/80,998.20 = 30,379.20/x
  3. Step 3: Cross multiply
    53,998.80x = 80,998.20 × 30,379.20
  4. Step 4: Simplify right side
    53,998.80x = 2,460,660,517.44
  5. Step 5: Solve for x
    x = 2,460,660,517.44/53,998.80
  6. Step 6: Final answer
    x = 45,568.80

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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.