Finding the Fourth Proportional to 94.23, 129.74 and 81.95
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Solution
The fourth proportional to 94.23, 129.74 and 81.95 is: 112.82
Step by Step Solution
- Step 1: Write the proportion equation
94.23 : 129.74 = 81.95 : x - Step 2: Convert to fraction form
94.23/129.74 = 81.95/x - Step 3: Cross multiply
94.23x = 129.74 × 81.95 - Step 4: Simplify right side
94.23x = 10,631.13 - Step 5: Solve for x
x = 10,631.13/94.23 - Step 6: Final answer
x = 112.82
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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.