Finding the Fourth Proportional to 122.88, 184.40 and 84.26
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Solution
The fourth proportional to 122.88, 184.40 and 84.26 is: 126.44
Step by Step Solution
- Step 1: Write the proportion equation
122.88 : 184.40 = 84.26 : x - Step 2: Convert to fraction form
122.88/184.40 = 84.26/x - Step 3: Cross multiply
122.88x = 184.40 × 84.26 - Step 4: Simplify right side
122.88x = 15,537.54 - Step 5: Solve for x
x = 15,537.54/122.88 - Step 6: Final answer
x = 126.44
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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.