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Finding the Fourth Proportional to 263,442.51, 395,202.24 and 85,905.90

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Solution

The fourth proportional to 263,442.51, 395,202.24 and 85,905.90 is: 128,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,442.51 : 395,202.24 = 85,905.90 : x
  2. Step 2: Convert to fraction form
    263,442.51/395,202.24 = 85,905.90/x
  3. Step 3: Cross multiply
    263,442.51x = 395,202.24 × 85,905.90
  4. Step 4: Simplify right side
    263,442.51x = 33,950,204,109.22
  5. Step 5: Solve for x
    x = 33,950,204,109.22/263,442.51
  6. Step 6: Final answer
    x = 128,871.40

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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.