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Finding the Fourth Proportional to 178.89, 246.78 and 101.26

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Solution

The fourth proportional to 178.89, 246.78 and 101.26 is: 139.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.89 : 246.78 = 101.26 : x
  2. Step 2: Convert to fraction form
    178.89/246.78 = 101.26/x
  3. Step 3: Cross multiply
    178.89x = 246.78 × 101.26
  4. Step 4: Simplify right side
    178.89x = 24,988.94
  5. Step 5: Solve for x
    x = 24,988.94/178.89
  6. Step 6: Final answer
    x = 139.69

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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.