Finding the Fourth Proportional to 168.75, 232.88 and 91.13
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Solution
The fourth proportional to 168.75, 232.88 and 91.13 is: 125.75
Step by Step Solution
- Step 1: Write the proportion equation
168.75 : 232.88 = 91.13 : x - Step 2: Convert to fraction form
168.75/232.88 = 91.13/x - Step 3: Cross multiply
168.75x = 232.88 × 91.13 - Step 4: Simplify right side
168.75x = 21,220.73 - Step 5: Solve for x
x = 21,220.73/168.75 - Step 6: Final answer
x = 125.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.