Finding the Fourth Proportional to 147.28, 203.26 and 81.79
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Solution
The fourth proportional to 147.28, 203.26 and 81.79 is: 112.88
Step by Step Solution
- Step 1: Write the proportion equation
147.28 : 203.26 = 81.79 : x - Step 2: Convert to fraction form
147.28/203.26 = 81.79/x - Step 3: Cross multiply
147.28x = 203.26 × 81.79 - Step 4: Simplify right side
147.28x = 16,624.64 - Step 5: Solve for x
x = 16,624.64/147.28 - Step 6: Final answer
x = 112.88
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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.