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Finding the Fourth Proportional to 164.54, 247.17 and 140.78

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Solution

The fourth proportional to 164.54, 247.17 and 140.78 is: 211.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.54 : 247.17 = 140.78 : x
  2. Step 2: Convert to fraction form
    164.54/247.17 = 140.78/x
  3. Step 3: Cross multiply
    164.54x = 247.17 × 140.78
  4. Step 4: Simplify right side
    164.54x = 34,796.59
  5. Step 5: Solve for x
    x = 34,796.59/164.54
  6. Step 6: Final answer
    x = 211.48

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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.