Finding the Fourth Proportional to 113.61, 170.26 and 84.74
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Solution
The fourth proportional to 113.61, 170.26 and 84.74 is: 126.99
Step by Step Solution
- Step 1: Write the proportion equation
113.61 : 170.26 = 84.74 : x - Step 2: Convert to fraction form
113.61/170.26 = 84.74/x - Step 3: Cross multiply
113.61x = 170.26 × 84.74 - Step 4: Simplify right side
113.61x = 14,427.83 - Step 5: Solve for x
x = 14,427.83/113.61 - Step 6: Final answer
x = 126.99
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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.