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Finding the Fourth Proportional to 158,651.10, 218,961.09 and 98,241.30

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Solution

The fourth proportional to 158,651.10, 218,961.09 and 98,241.30 is: 135,586.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,651.10 : 218,961.09 = 98,241.30 : x
  2. Step 2: Convert to fraction form
    158,651.10/218,961.09 = 98,241.30/x
  3. Step 3: Cross multiply
    158,651.10x = 218,961.09 × 98,241.30
  4. Step 4: Simplify right side
    158,651.10x = 21,511,022,131.02
  5. Step 5: Solve for x
    x = 21,511,022,131.02/158,651.10
  6. Step 6: Final answer
    x = 135,586.97

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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.