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Finding the Fourth Proportional to 89,930.80, 134,896.20 and 30,761.20

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Solution

The fourth proportional to 89,930.80, 134,896.20 and 30,761.20 is: 46,141.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,930.80 : 134,896.20 = 30,761.20 : x
  2. Step 2: Convert to fraction form
    89,930.80/134,896.20 = 30,761.20/x
  3. Step 3: Cross multiply
    89,930.80x = 134,896.20 × 30,761.20
  4. Step 4: Simplify right side
    89,930.80x = 4,149,568,987.44
  5. Step 5: Solve for x
    x = 4,149,568,987.44/89,930.80
  6. Step 6: Final answer
    x = 46,141.80

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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.