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Finding the Fourth Proportional to 178.92, 246.86 and 105.26

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Solution

The fourth proportional to 178.92, 246.86 and 105.26 is: 145.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.92 : 246.86 = 105.26 : x
  2. Step 2: Convert to fraction form
    178.92/246.86 = 105.26/x
  3. Step 3: Cross multiply
    178.92x = 246.86 × 105.26
  4. Step 4: Simplify right side
    178.92x = 25,984.48
  5. Step 5: Solve for x
    x = 25,984.48/178.92
  6. Step 6: Final answer
    x = 145.23

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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.