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Finding the Fourth Proportional to 263,354.90, 395,045.10 and 85,861.62

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Solution

The fourth proportional to 263,354.90, 395,045.10 and 85,861.62 is: 128,796.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,354.90 : 395,045.10 = 85,861.62 : x
  2. Step 2: Convert to fraction form
    263,354.90/395,045.10 = 85,861.62/x
  3. Step 3: Cross multiply
    263,354.90x = 395,045.10 × 85,861.62
  4. Step 4: Simplify right side
    263,354.90x = 33,919,212,259.06
  5. Step 5: Solve for x
    x = 33,919,212,259.06/263,354.90
  6. Step 6: Final answer
    x = 128,796.59

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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.