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Finding the Fourth Proportional to 178.72, 246.63 and 101.09

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Solution

The fourth proportional to 178.72, 246.63 and 101.09 is: 139.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.72 : 246.63 = 101.09 : x
  2. Step 2: Convert to fraction form
    178.72/246.63 = 101.09/x
  3. Step 3: Cross multiply
    178.72x = 246.63 × 101.09
  4. Step 4: Simplify right side
    178.72x = 24,932.44
  5. Step 5: Solve for x
    x = 24,932.44/178.72
  6. Step 6: Final answer
    x = 139.51

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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.