Finding the Fourth Proportional to 129.62, 194.50 and 86.32
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Solution
The fourth proportional to 129.62, 194.50 and 86.32 is: 129.52
Step by Step Solution
- Step 1: Write the proportion equation
129.62 : 194.50 = 86.32 : x - Step 2: Convert to fraction form
129.62/194.50 = 86.32/x - Step 3: Cross multiply
129.62x = 194.50 × 86.32 - Step 4: Simplify right side
129.62x = 16,789.24 - Step 5: Solve for x
x = 16,789.24/129.62 - Step 6: Final answer
x = 129.52
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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.