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Finding the Fourth Proportional to 164.66, 246.91 and 67.12

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Solution

The fourth proportional to 164.66, 246.91 and 67.12 is: 100.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.66 : 246.91 = 67.12 : x
  2. Step 2: Convert to fraction form
    164.66/246.91 = 67.12/x
  3. Step 3: Cross multiply
    164.66x = 246.91 × 67.12
  4. Step 4: Simplify right side
    164.66x = 16,571.03
  5. Step 5: Solve for x
    x = 16,571.03/164.66
  6. Step 6: Final answer
    x = 100.64

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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.