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Finding the Fourth Proportional to 85,396.64, 116,992.85 and 82,203.15

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Solution

The fourth proportional to 85,396.64, 116,992.85 and 82,203.15 is: 112,617.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,396.64 : 116,992.85 = 82,203.15 : x
  2. Step 2: Convert to fraction form
    85,396.64/116,992.85 = 82,203.15/x
  3. Step 3: Cross multiply
    85,396.64x = 116,992.85 × 82,203.15
  4. Step 4: Simplify right side
    85,396.64x = 9,617,180,069.25
  5. Step 5: Solve for x
    x = 9,617,180,069.25/85,396.64
  6. Step 6: Final answer
    x = 112,617.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.