Finding the Fourth Proportional to 129.44, 178.67 and 88.13
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Solution
The fourth proportional to 129.44, 178.67 and 88.13 is: 121.65
Step by Step Solution
- Step 1: Write the proportion equation
129.44 : 178.67 = 88.13 : x - Step 2: Convert to fraction form
129.44/178.67 = 88.13/x - Step 3: Cross multiply
129.44x = 178.67 × 88.13 - Step 4: Simplify right side
129.44x = 15,746.19 - Step 5: Solve for x
x = 15,746.19/129.44 - Step 6: Final answer
x = 121.65
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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.