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Finding the Fourth Proportional to 133.42, 199.15 and 122.60

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Solution

The fourth proportional to 133.42, 199.15 and 122.60 is: 183.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.42 : 199.15 = 122.60 : x
  2. Step 2: Convert to fraction form
    133.42/199.15 = 122.60/x
  3. Step 3: Cross multiply
    133.42x = 199.15 × 122.60
  4. Step 4: Simplify right side
    133.42x = 24,415.79
  5. Step 5: Solve for x
    x = 24,415.79/133.42
  6. Step 6: Final answer
    x = 183.00

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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.