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Finding the Fourth Proportional to 178.96, 247 and 101.36

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Solution

The fourth proportional to 178.96, 247 and 101.36 is: 139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.96 : 247 = 101.36 : x
  2. Step 2: Convert to fraction form
    178.96/247 = 101.36/x
  3. Step 3: Cross multiply
    178.96x = 247 × 101.36
  4. Step 4: Simplify right side
    178.96x = 25,035.92
  5. Step 5: Solve for x
    x = 25,035.92/178.96
  6. Step 6: Final answer
    x = 139.90

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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.