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Finding the Fourth Proportional to 139,263.54, 192,163.41 and 79,636.02

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Solution

The fourth proportional to 139,263.54, 192,163.41 and 79,636.02 is: 109,886.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,263.54 : 192,163.41 = 79,636.02 : x
  2. Step 2: Convert to fraction form
    139,263.54/192,163.41 = 79,636.02/x
  3. Step 3: Cross multiply
    139,263.54x = 192,163.41 × 79,636.02
  4. Step 4: Simplify right side
    139,263.54x = 15,303,129,162.03
  5. Step 5: Solve for x
    x = 15,303,129,162.03/139,263.54
  6. Step 6: Final answer
    x = 109,886.11

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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.