Finding the Fourth Proportional to 129.41, 178.75 and 114.67
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Solution
The fourth proportional to 129.41, 178.75 and 114.67 is: 158.39
Step by Step Solution
- Step 1: Write the proportion equation
129.41 : 178.75 = 114.67 : x - Step 2: Convert to fraction form
129.41/178.75 = 114.67/x - Step 3: Cross multiply
129.41x = 178.75 × 114.67 - Step 4: Simplify right side
129.41x = 20,497.26 - Step 5: Solve for x
x = 20,497.26/129.41 - Step 6: Final answer
x = 158.39
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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.