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Finding the Fourth Proportional to 139,747.44, 192,855.60 and 79,316.88

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Solution

The fourth proportional to 139,747.44, 192,855.60 and 79,316.88 is: 109,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,747.44 : 192,855.60 = 79,316.88 : x
  2. Step 2: Convert to fraction form
    139,747.44/192,855.60 = 79,316.88/x
  3. Step 3: Cross multiply
    139,747.44x = 192,855.60 × 79,316.88
  4. Step 4: Simplify right side
    139,747.44x = 15,296,704,482.53
  5. Step 5: Solve for x
    x = 15,296,704,482.53/139,747.44
  6. Step 6: Final answer
    x = 109,459.64

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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.