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Finding the Fourth Proportional to 133.42, 199.36 and 98.57

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Solution

The fourth proportional to 133.42, 199.36 and 98.57 is: 147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.42 : 199.36 = 98.57 : x
  2. Step 2: Convert to fraction form
    133.42/199.36 = 98.57/x
  3. Step 3: Cross multiply
    133.42x = 199.36 × 98.57
  4. Step 4: Simplify right side
    133.42x = 19,650.42
  5. Step 5: Solve for x
    x = 19,650.42/133.42
  6. Step 6: Final answer
    x = 147.28

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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.