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Finding the Fourth Proportional to 139,448.25, 192,945.24 and 121,580.46

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Solution

The fourth proportional to 139,448.25, 192,945.24 and 121,580.46 is: 168,222.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,448.25 : 192,945.24 = 121,580.46 : x
  2. Step 2: Convert to fraction form
    139,448.25/192,945.24 = 121,580.46/x
  3. Step 3: Cross multiply
    139,448.25x = 192,945.24 × 121,580.46
  4. Step 4: Simplify right side
    139,448.25x = 23,458,371,034.01
  5. Step 5: Solve for x
    x = 23,458,371,034.01/139,448.25
  6. Step 6: Final answer
    x = 168,222.77

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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.