Finding the Fourth Proportional to 187.21, 281.09 and 135.91
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Solution
The fourth proportional to 187.21, 281.09 and 135.91 is: 204.06
Step by Step Solution
- Step 1: Write the proportion equation
187.21 : 281.09 = 135.91 : x - Step 2: Convert to fraction form
187.21/281.09 = 135.91/x - Step 3: Cross multiply
187.21x = 281.09 × 135.91 - Step 4: Simplify right side
187.21x = 38,202.94 - Step 5: Solve for x
x = 38,202.94/187.21 - Step 6: Final answer
x = 204.06
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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.