Finding the Fourth Proportional to 127.21, 190.63 and 72.99
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Solution
The fourth proportional to 127.21, 190.63 and 72.99 is: 109.38
Step by Step Solution
- Step 1: Write the proportion equation
127.21 : 190.63 = 72.99 : x - Step 2: Convert to fraction form
127.21/190.63 = 72.99/x - Step 3: Cross multiply
127.21x = 190.63 × 72.99 - Step 4: Simplify right side
127.21x = 13,914.08 - Step 5: Solve for x
x = 13,914.08/127.21 - Step 6: Final answer
x = 109.38
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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.