Finding the Fourth Proportional to 126.14, 189.19 and 74.68
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Solution
The fourth proportional to 126.14, 189.19 and 74.68 is: 112.01
Step by Step Solution
- Step 1: Write the proportion equation
126.14 : 189.19 = 74.68 : x - Step 2: Convert to fraction form
126.14/189.19 = 74.68/x - Step 3: Cross multiply
126.14x = 189.19 × 74.68 - Step 4: Simplify right side
126.14x = 14,128.71 - Step 5: Solve for x
x = 14,128.71/126.14 - Step 6: Final answer
x = 112.01
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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.