Finding the Fourth Proportional to 129.18, 179.11 and 122.26
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Solution
The fourth proportional to 129.18, 179.11 and 122.26 is: 169.51
Step by Step Solution
- Step 1: Write the proportion equation
129.18 : 179.11 = 122.26 : x - Step 2: Convert to fraction form
129.18/179.11 = 122.26/x - Step 3: Cross multiply
129.18x = 179.11 × 122.26 - Step 4: Simplify right side
129.18x = 21,897.64 - Step 5: Solve for x
x = 21,897.64/129.18 - Step 6: Final answer
x = 169.51
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.