Finding the Fourth Proportional to 126.18, 174.08 and 79.53
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Solution
The fourth proportional to 126.18, 174.08 and 79.53 is: 109.72
Step by Step Solution
- Step 1: Write the proportion equation
126.18 : 174.08 = 79.53 : x - Step 2: Convert to fraction form
126.18/174.08 = 79.53/x - Step 3: Cross multiply
126.18x = 174.08 × 79.53 - Step 4: Simplify right side
126.18x = 13,844.18 - Step 5: Solve for x
x = 13,844.18/126.18 - Step 6: Final answer
x = 109.72
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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.