Finding the Fourth Proportional to 88.68, 132.37 and 81.99
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Solution
The fourth proportional to 88.68, 132.37 and 81.99 is: 122.39
Step by Step Solution
- Step 1: Write the proportion equation
88.68 : 132.37 = 81.99 : x - Step 2: Convert to fraction form
88.68/132.37 = 81.99/x - Step 3: Cross multiply
88.68x = 132.37 × 81.99 - Step 4: Simplify right side
88.68x = 10,853.35 - Step 5: Solve for x
x = 10,853.35/88.68 - Step 6: Final answer
x = 122.39
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.