Finding the Fourth Proportional to 99.96, 137.91 and 61.14
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Solution
The fourth proportional to 99.96, 137.91 and 61.14 is: 84.35
Step by Step Solution
- Step 1: Write the proportion equation
99.96 : 137.91 = 61.14 : x - Step 2: Convert to fraction form
99.96/137.91 = 61.14/x - Step 3: Cross multiply
99.96x = 137.91 × 61.14 - Step 4: Simplify right side
99.96x = 8,431.82 - Step 5: Solve for x
x = 8,431.82/99.96 - Step 6: Final answer
x = 84.35
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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.