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Finding the Fourth Proportional to 139,991.54, 193,204.72 and 79,571.26

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Solution

The fourth proportional to 139,991.54, 193,204.72 and 79,571.26 is: 109,817.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,991.54 : 193,204.72 = 79,571.26 : x
  2. Step 2: Convert to fraction form
    139,991.54/193,204.72 = 79,571.26/x
  3. Step 3: Cross multiply
    139,991.54x = 193,204.72 × 79,571.26
  4. Step 4: Simplify right side
    139,991.54x = 15,373,543,008.35
  5. Step 5: Solve for x
    x = 15,373,543,008.35/139,991.54
  6. Step 6: Final answer
    x = 109,817.66

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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.