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Finding the Fourth Proportional to 178.61, 246.36 and 104.85

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Solution

The fourth proportional to 178.61, 246.36 and 104.85 is: 144.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.61 : 246.36 = 104.85 : x
  2. Step 2: Convert to fraction form
    178.61/246.36 = 104.85/x
  3. Step 3: Cross multiply
    178.61x = 246.36 × 104.85
  4. Step 4: Simplify right side
    178.61x = 25,831.46
  5. Step 5: Solve for x
    x = 25,831.46/178.61
  6. Step 6: Final answer
    x = 144.63

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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.