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Finding the Fourth Proportional to 139,479.02, 192,474.84 and 79,046.12

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Solution

The fourth proportional to 139,479.02, 192,474.84 and 79,046.12 is: 109,080.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,479.02 : 192,474.84 = 79,046.12 : x
  2. Step 2: Convert to fraction form
    139,479.02/192,474.84 = 79,046.12/x
  3. Step 3: Cross multiply
    139,479.02x = 192,474.84 × 79,046.12
  4. Step 4: Simplify right side
    139,479.02x = 15,214,389,299.62
  5. Step 5: Solve for x
    x = 15,214,389,299.62/139,479.02
  6. Step 6: Final answer
    x = 109,080.13

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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.