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Finding the Fourth Proportional to 139,765.45, 209,645.64 and 34,584.43

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Solution

The fourth proportional to 139,765.45, 209,645.64 and 34,584.43 is: 51,876.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,765.45 : 209,645.64 = 34,584.43 : x
  2. Step 2: Convert to fraction form
    139,765.45/209,645.64 = 34,584.43/x
  3. Step 3: Cross multiply
    139,765.45x = 209,645.64 × 34,584.43
  4. Step 4: Simplify right side
    139,765.45x = 7,250,474,961.39
  5. Step 5: Solve for x
    x = 7,250,474,961.39/139,765.45
  6. Step 6: Final answer
    x = 51,876.02

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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.