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Finding the Fourth Proportional to 164.38, 246.45 and 68.20

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Solution

The fourth proportional to 164.38, 246.45 and 68.20 is: 102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.38 : 246.45 = 68.20 : x
  2. Step 2: Convert to fraction form
    164.38/246.45 = 68.20/x
  3. Step 3: Cross multiply
    164.38x = 246.45 × 68.20
  4. Step 4: Simplify right side
    164.38x = 16,807.89
  5. Step 5: Solve for x
    x = 16,807.89/164.38
  6. Step 6: Final answer
    x = 102.25

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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.