Home / 139,447.50-192,944.21-121,579.71

Finding the Fourth Proportional to 139,447.50, 192,944.21 and 121,579.71

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Solution

The fourth proportional to 139,447.50, 192,944.21 and 121,579.71 is: 168,221.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,447.50 : 192,944.21 = 121,579.71 : x
  2. Step 2: Convert to fraction form
    139,447.50/192,944.21 = 121,579.71/x
  3. Step 3: Cross multiply
    139,447.50x = 192,944.21 × 121,579.71
  4. Step 4: Simplify right side
    139,447.50x = 23,458,100,490.08
  5. Step 5: Solve for x
    x = 23,458,100,490.08/139,447.50
  6. Step 6: Final answer
    x = 168,221.74

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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.