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Finding the Fourth Proportional to 139,263.79, 192,163.76 and 79,636.27

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Solution

The fourth proportional to 139,263.79, 192,163.76 and 79,636.27 is: 109,886.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,263.79 : 192,163.76 = 79,636.27 : x
  2. Step 2: Convert to fraction form
    139,263.79/192,163.76 = 79,636.27/x
  3. Step 3: Cross multiply
    139,263.79x = 192,163.76 × 79,636.27
  4. Step 4: Simplify right side
    139,263.79x = 15,303,204,677.39
  5. Step 5: Solve for x
    x = 15,303,204,677.39/139,263.79
  6. Step 6: Final answer
    x = 109,886.46

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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.