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Finding the Fourth Proportional to 180.96, 249.74 and 107.28

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Solution

The fourth proportional to 180.96, 249.74 and 107.28 is: 148.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.96 : 249.74 = 107.28 : x
  2. Step 2: Convert to fraction form
    180.96/249.74 = 107.28/x
  3. Step 3: Cross multiply
    180.96x = 249.74 × 107.28
  4. Step 4: Simplify right side
    180.96x = 26,792.11
  5. Step 5: Solve for x
    x = 26,792.11/180.96
  6. Step 6: Final answer
    x = 148.06

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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.