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Finding the Fourth Proportional to 139,992.54, 193,206.10 and 79,572.26

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Solution

The fourth proportional to 139,992.54, 193,206.10 and 79,572.26 is: 109,819.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,992.54 : 193,206.10 = 79,572.26 : x
  2. Step 2: Convert to fraction form
    139,992.54/193,206.10 = 79,572.26/x
  3. Step 3: Cross multiply
    139,992.54x = 193,206.10 × 79,572.26
  4. Step 4: Simplify right side
    139,992.54x = 15,373,846,022.79
  5. Step 5: Solve for x
    x = 15,373,846,022.79/139,992.54
  6. Step 6: Final answer
    x = 109,819.04

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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.