Finding the Fourth Proportional to 74.93, 112.26 and 54.53
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Solution
The fourth proportional to 74.93, 112.26 and 54.53 is: 81.70
Step by Step Solution
- Step 1: Write the proportion equation
74.93 : 112.26 = 54.53 : x - Step 2: Convert to fraction form
74.93/112.26 = 54.53/x - Step 3: Cross multiply
74.93x = 112.26 × 54.53 - Step 4: Simplify right side
74.93x = 6,121.54 - Step 5: Solve for x
x = 6,121.54/74.93 - Step 6: Final answer
x = 81.70
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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.