Finding the Fourth Proportional to 144.22, 215.94 and 86.15
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Solution
The fourth proportional to 144.22, 215.94 and 86.15 is: 128.99
Step by Step Solution
- Step 1: Write the proportion equation
144.22 : 215.94 = 86.15 : x - Step 2: Convert to fraction form
144.22/215.94 = 86.15/x - Step 3: Cross multiply
144.22x = 215.94 × 86.15 - Step 4: Simplify right side
144.22x = 18,603.23 - Step 5: Solve for x
x = 18,603.23/144.22 - Step 6: Final answer
x = 128.99
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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.