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Finding the Fourth Proportional to 102.09, 153.19 and 54

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Solution

The fourth proportional to 102.09, 153.19 and 54 is: 81.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.09 : 153.19 = 54 : x
  2. Step 2: Convert to fraction form
    102.09/153.19 = 54/x
  3. Step 3: Cross multiply
    102.09x = 153.19 × 54
  4. Step 4: Simplify right side
    102.09x = 8,272.33
  5. Step 5: Solve for x
    x = 8,272.33/102.09
  6. Step 6: Final answer
    x = 81.03

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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.