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Finding the Fourth Proportional to 104.20, 155.28 and 98

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Solution

The fourth proportional to 104.20, 155.28 and 98 is: 146.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.20 : 155.28 = 98 : x
  2. Step 2: Convert to fraction form
    104.20/155.28 = 98/x
  3. Step 3: Cross multiply
    104.20x = 155.28 × 98
  4. Step 4: Simplify right side
    104.20x = 15,217.44
  5. Step 5: Solve for x
    x = 15,217.44/104.20
  6. Step 6: Final answer
    x = 146.04

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Find fourth proportional to 52.10, 77.64 and 49
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.