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Finding the Fourth Proportional to 153.79, 229.49 and 126.79

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Solution

The fourth proportional to 153.79, 229.49 and 126.79 is: 189.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.79 : 229.49 = 126.79 : x
  2. Step 2: Convert to fraction form
    153.79/229.49 = 126.79/x
  3. Step 3: Cross multiply
    153.79x = 229.49 × 126.79
  4. Step 4: Simplify right side
    153.79x = 29,097.02
  5. Step 5: Solve for x
    x = 29,097.02/153.79
  6. Step 6: Final answer
    x = 189.20

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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.