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Finding the Fourth Proportional to 82,138.85, 123,223.46 and 25,993.09

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Solution

The fourth proportional to 82,138.85, 123,223.46 and 25,993.09 is: 38,994.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,138.85 : 123,223.46 = 25,993.09 : x
  2. Step 2: Convert to fraction form
    82,138.85/123,223.46 = 25,993.09/x
  3. Step 3: Cross multiply
    82,138.85x = 123,223.46 × 25,993.09
  4. Step 4: Simplify right side
    82,138.85x = 3,202,958,485.89
  5. Step 5: Solve for x
    x = 3,202,958,485.89/82,138.85
  6. Step 6: Final answer
    x = 38,994.44

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Double scale
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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.