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Finding the Fourth Proportional to 178.86, 246.86 and 116.86

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Solution

The fourth proportional to 178.86, 246.86 and 116.86 is: 161.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.86 : 246.86 = 116.86 : x
  2. Step 2: Convert to fraction form
    178.86/246.86 = 116.86/x
  3. Step 3: Cross multiply
    178.86x = 246.86 × 116.86
  4. Step 4: Simplify right side
    178.86x = 28,848.06
  5. Step 5: Solve for x
    x = 28,848.06/178.86
  6. Step 6: Final answer
    x = 161.29

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