Finding the Fourth Proportional to 129.11, 177.93 and 126.41
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Solution
The fourth proportional to 129.11, 177.93 and 126.41 is: 174.21
Step by Step Solution
- Step 1: Write the proportion equation
129.11 : 177.93 = 126.41 : x - Step 2: Convert to fraction form
129.11/177.93 = 126.41/x - Step 3: Cross multiply
129.11x = 177.93 × 126.41 - Step 4: Simplify right side
129.11x = 22,491.24 - Step 5: Solve for x
x = 22,491.24/129.11 - Step 6: Final answer
x = 174.21
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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.