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Finding the Fourth Proportional to 85,367.57, 117,902.42 and 66,474.62

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Solution

The fourth proportional to 85,367.57, 117,902.42 and 66,474.62 is: 91,809.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,367.57 : 117,902.42 = 66,474.62 : x
  2. Step 2: Convert to fraction form
    85,367.57/117,902.42 = 66,474.62/x
  3. Step 3: Cross multiply
    85,367.57x = 117,902.42 × 66,474.62
  4. Step 4: Simplify right side
    85,367.57x = 7,837,519,279.75
  5. Step 5: Solve for x
    x = 7,837,519,279.75/85,367.57
  6. Step 6: Final answer
    x = 91,809.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.