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Finding the Fourth Proportional to 112,774.56, 168,694.32 and 85,917.33

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Solution

The fourth proportional to 112,774.56, 168,694.32 and 85,917.33 is: 128,519.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,774.56 : 168,694.32 = 85,917.33 : x
  2. Step 2: Convert to fraction form
    112,774.56/168,694.32 = 85,917.33/x
  3. Step 3: Cross multiply
    112,774.56x = 168,694.32 × 85,917.33
  4. Step 4: Simplify right side
    112,774.56x = 14,493,765,560.57
  5. Step 5: Solve for x
    x = 14,493,765,560.57/112,774.56
  6. Step 6: Final answer
    x = 128,519.81

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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.