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Finding the Fourth Proportional to 139,924.94, 193,101.56 and 79,505.80

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Solution

The fourth proportional to 139,924.94, 193,101.56 and 79,505.80 is: 109,720.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,924.94 : 193,101.56 = 79,505.80 : x
  2. Step 2: Convert to fraction form
    139,924.94/193,101.56 = 79,505.80/x
  3. Step 3: Cross multiply
    139,924.94x = 193,101.56 × 79,505.80
  4. Step 4: Simplify right side
    139,924.94x = 15,352,694,009.05
  5. Step 5: Solve for x
    x = 15,352,694,009.05/139,924.94
  6. Step 6: Final answer
    x = 109,720.93

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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.