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Finding the Fourth Proportional to 139,798.20, 192,914.92 and 79,360.86

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Solution

The fourth proportional to 139,798.20, 192,914.92 and 79,360.86 is: 109,514.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,798.20 : 192,914.92 = 79,360.86 : x
  2. Step 2: Convert to fraction form
    139,798.20/192,914.92 = 79,360.86/x
  3. Step 3: Cross multiply
    139,798.20x = 192,914.92 × 79,360.86
  4. Step 4: Simplify right side
    139,798.20x = 15,309,893,958.03
  5. Step 5: Solve for x
    x = 15,309,893,958.03/139,798.20
  6. Step 6: Final answer
    x = 109,514.24

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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.