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Finding the Fourth Proportional to 139,634.50, 192,681.03 and 79,185.82

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Solution

The fourth proportional to 139,634.50, 192,681.03 and 79,185.82 is: 109,268.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,634.50 : 192,681.03 = 79,185.82 : x
  2. Step 2: Convert to fraction form
    139,634.50/192,681.03 = 79,185.82/x
  3. Step 3: Cross multiply
    139,634.50x = 192,681.03 × 79,185.82
  4. Step 4: Simplify right side
    139,634.50x = 15,257,605,358.99
  5. Step 5: Solve for x
    x = 15,257,605,358.99/139,634.50
  6. Step 6: Final answer
    x = 109,268.16

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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.