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Finding the Fourth Proportional to 139,330.96, 192,356.43 and 91,722.71

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Solution

The fourth proportional to 139,330.96, 192,356.43 and 91,722.71 is: 126,629.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,330.96 : 192,356.43 = 91,722.71 : x
  2. Step 2: Convert to fraction form
    139,330.96/192,356.43 = 91,722.71/x
  3. Step 3: Cross multiply
    139,330.96x = 192,356.43 × 91,722.71
  4. Step 4: Simplify right side
    139,330.96x = 17,643,451,854.44
  5. Step 5: Solve for x
    x = 17,643,451,854.44/139,330.96
  6. Step 6: Final answer
    x = 126,629.80

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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.