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Finding the Fourth Proportional to 153.47, 229.77 and 126.74

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Solution

The fourth proportional to 153.47, 229.77 and 126.74 is: 189.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.47 : 229.77 = 126.74 : x
  2. Step 2: Convert to fraction form
    153.47/229.77 = 126.74/x
  3. Step 3: Cross multiply
    153.47x = 229.77 × 126.74
  4. Step 4: Simplify right side
    153.47x = 29,119.90
  5. Step 5: Solve for x
    x = 29,119.90/153.47
  6. Step 6: Final answer
    x = 189.75

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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.