Finding the Fourth Proportional to 126.42, 174.45 and 84.99
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Solution
The fourth proportional to 126.42, 174.45 and 84.99 is: 117.28
Step by Step Solution
- Step 1: Write the proportion equation
126.42 : 174.45 = 84.99 : x - Step 2: Convert to fraction form
126.42/174.45 = 84.99/x - Step 3: Cross multiply
126.42x = 174.45 × 84.99 - Step 4: Simplify right side
126.42x = 14,826.51 - Step 5: Solve for x
x = 14,826.51/126.42 - Step 6: Final answer
x = 117.28
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.