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Finding the Fourth Proportional to 104.82, 157.20 and 98.88

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Solution

The fourth proportional to 104.82, 157.20 and 98.88 is: 148.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.82 : 157.20 = 98.88 : x
  2. Step 2: Convert to fraction form
    104.82/157.20 = 98.88/x
  3. Step 3: Cross multiply
    104.82x = 157.20 × 98.88
  4. Step 4: Simplify right side
    104.82x = 15,543.94
  5. Step 5: Solve for x
    x = 15,543.94/104.82
  6. Step 6: Final answer
    x = 148.29

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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.