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Finding the Fourth Proportional to 153.68, 229.70 and 133.34

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Solution

The fourth proportional to 153.68, 229.70 and 133.34 is: 199.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.68 : 229.70 = 133.34 : x
  2. Step 2: Convert to fraction form
    153.68/229.70 = 133.34/x
  3. Step 3: Cross multiply
    153.68x = 229.70 × 133.34
  4. Step 4: Simplify right side
    153.68x = 30,626.38
  5. Step 5: Solve for x
    x = 30,626.38/153.68
  6. Step 6: Final answer
    x = 199.29

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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.