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Finding the Fourth Proportional to 144.36, 216.76 and 118.84

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Solution

The fourth proportional to 144.36, 216.76 and 118.84 is: 178.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.36 : 216.76 = 118.84 : x
  2. Step 2: Convert to fraction form
    144.36/216.76 = 118.84/x
  3. Step 3: Cross multiply
    144.36x = 216.76 × 118.84
  4. Step 4: Simplify right side
    144.36x = 25,759.76
  5. Step 5: Solve for x
    x = 25,759.76/144.36
  6. Step 6: Final answer
    x = 178.44

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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.