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Finding the Fourth Proportional to 99.75, 149.60 and 27.60

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Solution

The fourth proportional to 99.75, 149.60 and 27.60 is: 41.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.75 : 149.60 = 27.60 : x
  2. Step 2: Convert to fraction form
    99.75/149.60 = 27.60/x
  3. Step 3: Cross multiply
    99.75x = 149.60 × 27.60
  4. Step 4: Simplify right side
    99.75x = 4,128.82
  5. Step 5: Solve for x
    x = 4,128.82/99.75
  6. Step 6: Final answer
    x = 41.39

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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.