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Finding the Fourth Proportional to 139,591.06, 192,669.87 and 79,197.05

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Solution

The fourth proportional to 139,591.06, 192,669.87 and 79,197.05 is: 109,311.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,591.06 : 192,669.87 = 79,197.05 : x
  2. Step 2: Convert to fraction form
    139,591.06/192,669.87 = 79,197.05/x
  3. Step 3: Cross multiply
    139,591.06x = 192,669.87 × 79,197.05
  4. Step 4: Simplify right side
    139,591.06x = 15,258,885,327.88
  5. Step 5: Solve for x
    x = 15,258,885,327.88/139,591.06
  6. Step 6: Final answer
    x = 109,311.34

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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.