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Finding the Fourth Proportional to 261,069.26, 391,631.22 and 111,325.37

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Solution

The fourth proportional to 261,069.26, 391,631.22 and 111,325.37 is: 166,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,069.26 : 391,631.22 = 111,325.37 : x
  2. Step 2: Convert to fraction form
    261,069.26/391,631.22 = 111,325.37/x
  3. Step 3: Cross multiply
    261,069.26x = 391,631.22 × 111,325.37
  4. Step 4: Simplify right side
    261,069.26x = 43,598,488,511.90
  5. Step 5: Solve for x
    x = 43,598,488,511.90/261,069.26
  6. Step 6: Final answer
    x = 166,999.70

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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.