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Finding the Fourth Proportional to 164.40, 246.48 and 121.68

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Solution

The fourth proportional to 164.40, 246.48 and 121.68 is: 182.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.40 : 246.48 = 121.68 : x
  2. Step 2: Convert to fraction form
    164.40/246.48 = 121.68/x
  3. Step 3: Cross multiply
    164.40x = 246.48 × 121.68
  4. Step 4: Simplify right side
    164.40x = 29,991.69
  5. Step 5: Solve for x
    x = 29,991.69/164.40
  6. Step 6: Final answer
    x = 182.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.