Finding the Fourth Proportional to 99.96, 138.18 and 71.10
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Solution
The fourth proportional to 99.96, 138.18 and 71.10 is: 98.29
Step by Step Solution
- Step 1: Write the proportion equation
99.96 : 138.18 = 71.10 : x - Step 2: Convert to fraction form
99.96/138.18 = 71.10/x - Step 3: Cross multiply
99.96x = 138.18 × 71.10 - Step 4: Simplify right side
99.96x = 9,824.60 - Step 5: Solve for x
x = 9,824.60/99.96 - Step 6: Final answer
x = 98.29
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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.