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Finding the Fourth Proportional to 263,404.21, 395,066.19 and 85,910.94

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Solution

The fourth proportional to 263,404.21, 395,066.19 and 85,910.94 is: 128,853.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,404.21 : 395,066.19 = 85,910.94 : x
  2. Step 2: Convert to fraction form
    263,404.21/395,066.19 = 85,910.94/x
  3. Step 3: Cross multiply
    263,404.21x = 395,066.19 × 85,910.94
  4. Step 4: Simplify right side
    263,404.21x = 33,940,507,745.12
  5. Step 5: Solve for x
    x = 33,940,507,745.12/263,404.21
  6. Step 6: Final answer
    x = 128,853.32

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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.