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Finding the Fourth Proportional to 139,199.65, 192,093.45 and 81,845.44

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Solution

The fourth proportional to 139,199.65, 192,093.45 and 81,845.44 is: 112,945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,199.65 : 192,093.45 = 81,845.44 : x
  2. Step 2: Convert to fraction form
    139,199.65/192,093.45 = 81,845.44/x
  3. Step 3: Cross multiply
    139,199.65x = 192,093.45 × 81,845.44
  4. Step 4: Simplify right side
    139,199.65x = 15,721,972,936.37
  5. Step 5: Solve for x
    x = 15,721,972,936.37/139,199.65
  6. Step 6: Final answer
    x = 112,945.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.