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Finding the Fourth Proportional to 139,797.58, 192,926.12 and 79,373.85

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Solution

The fourth proportional to 139,797.58, 192,926.12 and 79,373.85 is: 109,539.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,797.58 : 192,926.12 = 79,373.85 : x
  2. Step 2: Convert to fraction form
    139,797.58/192,926.12 = 79,373.85/x
  3. Step 3: Cross multiply
    139,797.58x = 192,926.12 × 79,373.85
  4. Step 4: Simplify right side
    139,797.58x = 15,313,288,909.96
  5. Step 5: Solve for x
    x = 15,313,288,909.96/139,797.58
  6. Step 6: Final answer
    x = 109,539.01

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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.