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Finding the Fourth Proportional to 133.65, 199.80 and 104.49

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Solution

The fourth proportional to 133.65, 199.80 and 104.49 is: 156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.65 : 199.80 = 104.49 : x
  2. Step 2: Convert to fraction form
    133.65/199.80 = 104.49/x
  3. Step 3: Cross multiply
    133.65x = 199.80 × 104.49
  4. Step 4: Simplify right side
    133.65x = 20,877.10
  5. Step 5: Solve for x
    x = 20,877.10/133.65
  6. Step 6: Final answer
    x = 156.21

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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.