Finding the Fourth Proportional to 112.17, 154.82 and 63.05
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Solution
The fourth proportional to 112.17, 154.82 and 63.05 is: 87.02
Step by Step Solution
- Step 1: Write the proportion equation
112.17 : 154.82 = 63.05 : x - Step 2: Convert to fraction form
112.17/154.82 = 63.05/x - Step 3: Cross multiply
112.17x = 154.82 × 63.05 - Step 4: Simplify right side
112.17x = 9,761.40 - Step 5: Solve for x
x = 9,761.40/112.17 - Step 6: Final answer
x = 87.02
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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.