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Finding the Fourth Proportional to 119.64, 179.30 and 118.28

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Solution

The fourth proportional to 119.64, 179.30 and 118.28 is: 177.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.64 : 179.30 = 118.28 : x
  2. Step 2: Convert to fraction form
    119.64/179.30 = 118.28/x
  3. Step 3: Cross multiply
    119.64x = 179.30 × 118.28
  4. Step 4: Simplify right side
    119.64x = 21,207.60
  5. Step 5: Solve for x
    x = 21,207.60/119.64
  6. Step 6: Final answer
    x = 177.26

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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.