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Finding the Fourth Proportional to 139,843.17, 192,984.90 and 79,415.07

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Solution

The fourth proportional to 139,843.17, 192,984.90 and 79,415.07 is: 109,593.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,843.17 : 192,984.90 = 79,415.07 : x
  2. Step 2: Convert to fraction form
    139,843.17/192,984.90 = 79,415.07/x
  3. Step 3: Cross multiply
    139,843.17x = 192,984.90 × 79,415.07
  4. Step 4: Simplify right side
    139,843.17x = 15,325,909,342.44
  5. Step 5: Solve for x
    x = 15,325,909,342.44/139,843.17
  6. Step 6: Final answer
    x = 109,593.55

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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.