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Finding the Fourth Proportional to 144.12, 215.36 and 134.80

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Solution

The fourth proportional to 144.12, 215.36 and 134.80 is: 201.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.12 : 215.36 = 134.80 : x
  2. Step 2: Convert to fraction form
    144.12/215.36 = 134.80/x
  3. Step 3: Cross multiply
    144.12x = 215.36 × 134.80
  4. Step 4: Simplify right side
    144.12x = 29,030.53
  5. Step 5: Solve for x
    x = 29,030.53/144.12
  6. Step 6: Final answer
    x = 201.43

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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.