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Finding the Fourth Proportional to 146.07, 201.37 and 128.43

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Solution

The fourth proportional to 146.07, 201.37 and 128.43 is: 177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.07 : 201.37 = 128.43 : x
  2. Step 2: Convert to fraction form
    146.07/201.37 = 128.43/x
  3. Step 3: Cross multiply
    146.07x = 201.37 × 128.43
  4. Step 4: Simplify right side
    146.07x = 25,861.95
  5. Step 5: Solve for x
    x = 25,861.95/146.07
  6. Step 6: Final answer
    x = 177.05

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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.