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Finding the Fourth Proportional to 139,467.26, 192,468.87 and 79,035.89

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Solution

The fourth proportional to 139,467.26, 192,468.87 and 79,035.89 is: 109,071.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,467.26 : 192,468.87 = 79,035.89 : x
  2. Step 2: Convert to fraction form
    139,467.26/192,468.87 = 79,035.89/x
  3. Step 3: Cross multiply
    139,467.26x = 192,468.87 × 79,035.89
  4. Step 4: Simplify right side
    139,467.26x = 15,211,947,475.40
  5. Step 5: Solve for x
    x = 15,211,947,475.40/139,467.26
  6. Step 6: Final answer
    x = 109,071.82

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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.