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Finding the Fourth Proportional to 54,029.60, 80,986.80 and 20,736.80

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Solution

The fourth proportional to 54,029.60, 80,986.80 and 20,736.80 is: 31,083.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,029.60 : 80,986.80 = 20,736.80 : x
  2. Step 2: Convert to fraction form
    54,029.60/80,986.80 = 20,736.80/x
  3. Step 3: Cross multiply
    54,029.60x = 80,986.80 × 20,736.80
  4. Step 4: Simplify right side
    54,029.60x = 1,679,407,074.24
  5. Step 5: Solve for x
    x = 1,679,407,074.24/54,029.60
  6. Step 6: Final answer
    x = 31,083.09

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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.