Finding the Fourth Proportional to 84.18, 126.21 and 47.63
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Solution
The fourth proportional to 84.18, 126.21 and 47.63 is: 71.41
Step by Step Solution
- Step 1: Write the proportion equation
84.18 : 126.21 = 47.63 : x - Step 2: Convert to fraction form
84.18/126.21 = 47.63/x - Step 3: Cross multiply
84.18x = 126.21 × 47.63 - Step 4: Simplify right side
84.18x = 6,011.38 - Step 5: Solve for x
x = 6,011.38/84.18 - Step 6: Final answer
x = 71.41
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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.