Finding the Fourth Proportional to 81.62, 122.28 and 58.74
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Solution
The fourth proportional to 81.62, 122.28 and 58.74 is: 88.00
Step by Step Solution
- Step 1: Write the proportion equation
81.62 : 122.28 = 58.74 : x - Step 2: Convert to fraction form
81.62/122.28 = 58.74/x - Step 3: Cross multiply
81.62x = 122.28 × 58.74 - Step 4: Simplify right side
81.62x = 7,183.23 - Step 5: Solve for x
x = 7,183.23/81.62 - Step 6: Final answer
x = 88.00
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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.