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Finding the Fourth Proportional to 178.70, 246.61 and 126.22

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Solution

The fourth proportional to 178.70, 246.61 and 126.22 is: 174.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.70 : 246.61 = 126.22 : x
  2. Step 2: Convert to fraction form
    178.70/246.61 = 126.22/x
  3. Step 3: Cross multiply
    178.70x = 246.61 × 126.22
  4. Step 4: Simplify right side
    178.70x = 31,127.11
  5. Step 5: Solve for x
    x = 31,127.11/178.70
  6. Step 6: Final answer
    x = 174.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.