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Finding the Fourth Proportional to 139,383.20, 209,090 and 44,591.10

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Solution

The fourth proportional to 139,383.20, 209,090 and 44,591.10 is: 66,891.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,383.20 : 209,090 = 44,591.10 : x
  2. Step 2: Convert to fraction form
    139,383.20/209,090 = 44,591.10/x
  3. Step 3: Cross multiply
    139,383.20x = 209,090 × 44,591.10
  4. Step 4: Simplify right side
    139,383.20x = 9,323,553,099
  5. Step 5: Solve for x
    x = 9,323,553,099/139,383.20
  6. Step 6: Final answer
    x = 66,891.51

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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.