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Finding the Fourth Proportional to 139,906.89, 209,922.30 and 73,331.19

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Solution

The fourth proportional to 139,906.89, 209,922.30 and 73,331.19 is: 110,029.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,906.89 : 209,922.30 = 73,331.19 : x
  2. Step 2: Convert to fraction form
    139,906.89/209,922.30 = 73,331.19/x
  3. Step 3: Cross multiply
    139,906.89x = 209,922.30 × 73,331.19
  4. Step 4: Simplify right side
    139,906.89x = 15,393,852,066.54
  5. Step 5: Solve for x
    x = 15,393,852,066.54/139,906.89
  6. Step 6: Final answer
    x = 110,029.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.