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Finding the Fourth Proportional to 139,620.60, 209,551.82 and 73,107.24

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Solution

The fourth proportional to 139,620.60, 209,551.82 and 73,107.24 is: 109,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.60 : 209,551.82 = 73,107.24 : x
  2. Step 2: Convert to fraction form
    139,620.60/209,551.82 = 73,107.24/x
  3. Step 3: Cross multiply
    139,620.60x = 209,551.82 × 73,107.24
  4. Step 4: Simplify right side
    139,620.60x = 15,319,755,197.18
  5. Step 5: Solve for x
    x = 15,319,755,197.18/139,620.60
  6. Step 6: Final answer
    x = 109,724.18

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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.