Finding the Fourth Proportional to 74.88, 112.05 and 63.99
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Solution
The fourth proportional to 74.88, 112.05 and 63.99 is: 95.75
Step by Step Solution
- Step 1: Write the proportion equation
74.88 : 112.05 = 63.99 : x - Step 2: Convert to fraction form
74.88/112.05 = 63.99/x - Step 3: Cross multiply
74.88x = 112.05 × 63.99 - Step 4: Simplify right side
74.88x = 7,170.08 - Step 5: Solve for x
x = 7,170.08/74.88 - Step 6: Final answer
x = 95.75
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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.