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Finding the Fourth Proportional to 158,640.05, 218,922.66 and 98,198.66

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Solution

The fourth proportional to 158,640.05, 218,922.66 and 98,198.66 is: 135,513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,640.05 : 218,922.66 = 98,198.66 : x
  2. Step 2: Convert to fraction form
    158,640.05/218,922.66 = 98,198.66/x
  3. Step 3: Cross multiply
    158,640.05x = 218,922.66 × 98,198.66
  4. Step 4: Simplify right side
    158,640.05x = 21,497,912,402.94
  5. Step 5: Solve for x
    x = 21,497,912,402.94/158,640.05
  6. Step 6: Final answer
    x = 135,513.78

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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.