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Finding the Fourth Proportional to 164.79, 248.31 and 136.53

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Solution

The fourth proportional to 164.79, 248.31 and 136.53 is: 205.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.79 : 248.31 = 136.53 : x
  2. Step 2: Convert to fraction form
    164.79/248.31 = 136.53/x
  3. Step 3: Cross multiply
    164.79x = 248.31 × 136.53
  4. Step 4: Simplify right side
    164.79x = 33,902.85
  5. Step 5: Solve for x
    x = 33,902.85/164.79
  6. Step 6: Final answer
    x = 205.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.