Finding the Fourth Proportional to 126.28, 189.36 and 49.19
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Solution
The fourth proportional to 126.28, 189.36 and 49.19 is: 73.77
Step by Step Solution
- Step 1: Write the proportion equation
126.28 : 189.36 = 49.19 : x - Step 2: Convert to fraction form
126.28/189.36 = 49.19/x - Step 3: Cross multiply
126.28x = 189.36 × 49.19 - Step 4: Simplify right side
126.28x = 9,315.09 - Step 5: Solve for x
x = 9,315.09/126.28 - Step 6: Final answer
x = 73.77
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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.