Finding the Fourth Proportional to 114.21, 171.11 and 91.08
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Solution
The fourth proportional to 114.21, 171.11 and 91.08 is: 136.45
Step by Step Solution
- Step 1: Write the proportion equation
114.21 : 171.11 = 91.08 : x - Step 2: Convert to fraction form
114.21/171.11 = 91.08/x - Step 3: Cross multiply
114.21x = 171.11 × 91.08 - Step 4: Simplify right side
114.21x = 15,584.24 - Step 5: Solve for x
x = 15,584.24/114.21 - Step 6: Final answer
x = 136.45
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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.