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Finding the Fourth Proportional to 139,598.26, 192,645.68 and 79,149.58

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Solution

The fourth proportional to 139,598.26, 192,645.68 and 79,149.58 is: 109,226.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,598.26 : 192,645.68 = 79,149.58 : x
  2. Step 2: Convert to fraction form
    139,598.26/192,645.68 = 79,149.58/x
  3. Step 3: Cross multiply
    139,598.26x = 192,645.68 × 79,149.58
  4. Step 4: Simplify right side
    139,598.26x = 15,247,824,660.81
  5. Step 5: Solve for x
    x = 15,247,824,660.81/139,598.26
  6. Step 6: Final answer
    x = 109,226.47

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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.