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Finding the Fourth Proportional to 139,620.98, 209,442 and 43,546.07

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Solution

The fourth proportional to 139,620.98, 209,442 and 43,546.07 is: 65,322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.98 : 209,442 = 43,546.07 : x
  2. Step 2: Convert to fraction form
    139,620.98/209,442 = 43,546.07/x
  3. Step 3: Cross multiply
    139,620.98x = 209,442 × 43,546.07
  4. Step 4: Simplify right side
    139,620.98x = 9,120,375,992.94
  5. Step 5: Solve for x
    x = 9,120,375,992.94/139,620.98
  6. Step 6: Final answer
    x = 65,322.39

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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.