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Finding the Fourth Proportional to 139,738.80, 209,589.30 and 55,560.90

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Solution

The fourth proportional to 139,738.80, 209,589.30 and 55,560.90 is: 83,333.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,738.80 : 209,589.30 = 55,560.90 : x
  2. Step 2: Convert to fraction form
    139,738.80/209,589.30 = 55,560.90/x
  3. Step 3: Cross multiply
    139,738.80x = 209,589.30 × 55,560.90
  4. Step 4: Simplify right side
    139,738.80x = 11,644,970,138.37
  5. Step 5: Solve for x
    x = 11,644,970,138.37/139,738.80
  6. Step 6: Final answer
    x = 83,333.84

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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.