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Finding the Fourth Proportional to 133.27, 199.98 and 72.45

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Solution

The fourth proportional to 133.27, 199.98 and 72.45 is: 108.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.27 : 199.98 = 72.45 : x
  2. Step 2: Convert to fraction form
    133.27/199.98 = 72.45/x
  3. Step 3: Cross multiply
    133.27x = 199.98 × 72.45
  4. Step 4: Simplify right side
    133.27x = 14,488.55
  5. Step 5: Solve for x
    x = 14,488.55/133.27
  6. Step 6: Final answer
    x = 108.72

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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.