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Finding the Fourth Proportional to 198,903.15, 274,608.99 and 136,919.47

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Solution

The fourth proportional to 198,903.15, 274,608.99 and 136,919.47 is: 189,033.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,903.15 : 274,608.99 = 136,919.47 : x
  2. Step 2: Convert to fraction form
    198,903.15/274,608.99 = 136,919.47/x
  3. Step 3: Cross multiply
    198,903.15x = 274,608.99 × 136,919.47
  4. Step 4: Simplify right side
    198,903.15x = 37,599,315,310.39
  5. Step 5: Solve for x
    x = 37,599,315,310.39/198,903.15
  6. Step 6: Final answer
    x = 189,033.29

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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.