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Finding the Fourth Proportional to 155.44, 214.60 and 103.06

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Solution

The fourth proportional to 155.44, 214.60 and 103.06 is: 142.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.44 : 214.60 = 103.06 : x
  2. Step 2: Convert to fraction form
    155.44/214.60 = 103.06/x
  3. Step 3: Cross multiply
    155.44x = 214.60 × 103.06
  4. Step 4: Simplify right side
    155.44x = 22,115.62
  5. Step 5: Solve for x
    x = 22,115.62/155.44
  6. Step 6: Final answer
    x = 142.28

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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.