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Finding the Fourth Proportional to 80,112.90, 120,228.42 and 37,993.08

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Solution

The fourth proportional to 80,112.90, 120,228.42 and 37,993.08 is: 57,017.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,112.90 : 120,228.42 = 37,993.08 : x
  2. Step 2: Convert to fraction form
    80,112.90/120,228.42 = 37,993.08/x
  3. Step 3: Cross multiply
    80,112.90x = 120,228.42 × 37,993.08
  4. Step 4: Simplify right side
    80,112.90x = 4,567,847,979.33
  5. Step 5: Solve for x
    x = 4,567,847,979.33/80,112.90
  6. Step 6: Final answer
    x = 57,017.63

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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.