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Finding the Fourth Proportional to 104.42, 156.57 and 98.38

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Solution

The fourth proportional to 104.42, 156.57 and 98.38 is: 147.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.42 : 156.57 = 98.38 : x
  2. Step 2: Convert to fraction form
    104.42/156.57 = 98.38/x
  3. Step 3: Cross multiply
    104.42x = 156.57 × 98.38
  4. Step 4: Simplify right side
    104.42x = 15,403.18
  5. Step 5: Solve for x
    x = 15,403.18/104.42
  6. Step 6: Final answer
    x = 147.51

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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.