Finding the Fourth Proportional to 81.48, 122.36 and 49.08
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Solution
The fourth proportional to 81.48, 122.36 and 49.08 is: 73.70
Step by Step Solution
- Step 1: Write the proportion equation
81.48 : 122.36 = 49.08 : x - Step 2: Convert to fraction form
81.48/122.36 = 49.08/x - Step 3: Cross multiply
81.48x = 122.36 × 49.08 - Step 4: Simplify right side
81.48x = 6,005.43 - Step 5: Solve for x
x = 6,005.43/81.48 - Step 6: Final answer
x = 73.70
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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.