Finding the Fourth Proportional to 147.21, 203.11 and 91.95
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Solution
The fourth proportional to 147.21, 203.11 and 91.95 is: 126.86
Step by Step Solution
- Step 1: Write the proportion equation
147.21 : 203.11 = 91.95 : x - Step 2: Convert to fraction form
147.21/203.11 = 91.95/x - Step 3: Cross multiply
147.21x = 203.11 × 91.95 - Step 4: Simplify right side
147.21x = 18,675.73 - Step 5: Solve for x
x = 18,675.73/147.21 - Step 6: Final answer
x = 126.86
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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.