Finding the Fourth Proportional to 84.08, 126.87 and 81.06
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Solution
The fourth proportional to 84.08, 126.87 and 81.06 is: 122.32
Step by Step Solution
- Step 1: Write the proportion equation
84.08 : 126.87 = 81.06 : x - Step 2: Convert to fraction form
84.08/126.87 = 81.06/x - Step 3: Cross multiply
84.08x = 126.87 × 81.06 - Step 4: Simplify right side
84.08x = 10,284.08 - Step 5: Solve for x
x = 10,284.08/84.08 - Step 6: Final answer
x = 122.32
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.