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Finding the Fourth Proportional to 146.37, 201.99 and 84.21

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Solution

The fourth proportional to 146.37, 201.99 and 84.21 is: 116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.37 : 201.99 = 84.21 : x
  2. Step 2: Convert to fraction form
    146.37/201.99 = 84.21/x
  3. Step 3: Cross multiply
    146.37x = 201.99 × 84.21
  4. Step 4: Simplify right side
    146.37x = 17,009.58
  5. Step 5: Solve for x
    x = 17,009.58/146.37
  6. Step 6: Final answer
    x = 116.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.