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Finding the Fourth Proportional to 177.94, 266.80 and 126.70

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Solution

The fourth proportional to 177.94, 266.80 and 126.70 is: 189.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.94 : 266.80 = 126.70 : x
  2. Step 2: Convert to fraction form
    177.94/266.80 = 126.70/x
  3. Step 3: Cross multiply
    177.94x = 266.80 × 126.70
  4. Step 4: Simplify right side
    177.94x = 33,803.56
  5. Step 5: Solve for x
    x = 33,803.56/177.94
  6. Step 6: Final answer
    x = 189.97

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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.