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Finding the Fourth Proportional to 104.31, 143.82 and 98.03

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Solution

The fourth proportional to 104.31, 143.82 and 98.03 is: 135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.31 : 143.82 = 98.03 : x
  2. Step 2: Convert to fraction form
    104.31/143.82 = 98.03/x
  3. Step 3: Cross multiply
    104.31x = 143.82 × 98.03
  4. Step 4: Simplify right side
    104.31x = 14,097.96
  5. Step 5: Solve for x
    x = 14,097.96/104.31
  6. Step 6: Final answer
    x = 135.15

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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.