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Finding the Fourth Proportional to 133.72, 199.62 and 129.24

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Solution

The fourth proportional to 133.72, 199.62 and 129.24 is: 192.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.72 : 199.62 = 129.24 : x
  2. Step 2: Convert to fraction form
    133.72/199.62 = 129.24/x
  3. Step 3: Cross multiply
    133.72x = 199.62 × 129.24
  4. Step 4: Simplify right side
    133.72x = 25,798.89
  5. Step 5: Solve for x
    x = 25,798.89/133.72
  6. Step 6: Final answer
    x = 192.93

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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.