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Finding the Fourth Proportional to 134.88, 201.28 and 118.64

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Solution

The fourth proportional to 134.88, 201.28 and 118.64 is: 177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.88 : 201.28 = 118.64 : x
  2. Step 2: Convert to fraction form
    134.88/201.28 = 118.64/x
  3. Step 3: Cross multiply
    134.88x = 201.28 × 118.64
  4. Step 4: Simplify right side
    134.88x = 23,879.86
  5. Step 5: Solve for x
    x = 23,879.86/134.88
  6. Step 6: Final answer
    x = 177.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.