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Finding the Fourth Proportional to 260,837.10, 391,109.85 and 111,051.90

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Solution

The fourth proportional to 260,837.10, 391,109.85 and 111,051.90 is: 166,515.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,837.10 : 391,109.85 = 111,051.90 : x
  2. Step 2: Convert to fraction form
    260,837.10/391,109.85 = 111,051.90/x
  3. Step 3: Cross multiply
    260,837.10x = 391,109.85 × 111,051.90
  4. Step 4: Simplify right side
    260,837.10x = 43,433,491,951.22
  5. Step 5: Solve for x
    x = 43,433,491,951.22/260,837.10
  6. Step 6: Final answer
    x = 166,515.78

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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.