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Finding the Fourth Proportional to 139,941.92, 193,010.64 and 89,645.60

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Solution

The fourth proportional to 139,941.92, 193,010.64 and 89,645.60 is: 123,640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,941.92 : 193,010.64 = 89,645.60 : x
  2. Step 2: Convert to fraction form
    139,941.92/193,010.64 = 89,645.60/x
  3. Step 3: Cross multiply
    139,941.92x = 193,010.64 × 89,645.60
  4. Step 4: Simplify right side
    139,941.92x = 17,302,554,629.18
  5. Step 5: Solve for x
    x = 17,302,554,629.18/139,941.92
  6. Step 6: Final answer
    x = 123,640.97

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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.