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Finding the Fourth Proportional to 139,727.88, 192,825.36 and 76,065.66

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Solution

The fourth proportional to 139,727.88, 192,825.36 and 76,065.66 is: 104,971.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,727.88 : 192,825.36 = 76,065.66 : x
  2. Step 2: Convert to fraction form
    139,727.88/192,825.36 = 76,065.66/x
  3. Step 3: Cross multiply
    139,727.88x = 192,825.36 × 76,065.66
  4. Step 4: Simplify right side
    139,727.88x = 14,667,388,273.14
  5. Step 5: Solve for x
    x = 14,667,388,273.14/139,727.88
  6. Step 6: Final answer
    x = 104,971.09

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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.