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Finding the Fourth Proportional to 139,718.69, 192,811.82 and 76,056.97

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Solution

The fourth proportional to 139,718.69, 192,811.82 and 76,056.97 is: 104,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.69 : 192,811.82 = 76,056.97 : x
  2. Step 2: Convert to fraction form
    139,718.69/192,811.82 = 76,056.97/x
  3. Step 3: Cross multiply
    139,718.69x = 192,811.82 × 76,056.97
  4. Step 4: Simplify right side
    139,718.69x = 14,664,681,465.04
  5. Step 5: Solve for x
    x = 14,664,681,465.04/139,718.69
  6. Step 6: Final answer
    x = 104,958.62

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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.