Finding the Fourth Proportional to 94.30, 129.94 and 80.62
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Solution
The fourth proportional to 94.30, 129.94 and 80.62 is: 111.09
Step by Step Solution
- Step 1: Write the proportion equation
94.30 : 129.94 = 80.62 : x - Step 2: Convert to fraction form
94.30/129.94 = 80.62/x - Step 3: Cross multiply
94.30x = 129.94 × 80.62 - Step 4: Simplify right side
94.30x = 10,475.76 - Step 5: Solve for x
x = 10,475.76/94.30 - Step 6: Final answer
x = 111.09
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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.