Finding the Fourth Proportional to 84.36, 115.41 and 84.09
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Solution
The fourth proportional to 84.36, 115.41 and 84.09 is: 115.04
Step by Step Solution
- Step 1: Write the proportion equation
84.36 : 115.41 = 84.09 : x - Step 2: Convert to fraction form
84.36/115.41 = 84.09/x - Step 3: Cross multiply
84.36x = 115.41 × 84.09 - Step 4: Simplify right side
84.36x = 9,704.83 - Step 5: Solve for x
x = 9,704.83/84.36 - Step 6: Final answer
x = 115.04
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.