Finding the Fourth Proportional to 68.18, 102.36 and 66.96
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Solution
The fourth proportional to 68.18, 102.36 and 66.96 is: 100.54
Step by Step Solution
- Step 1: Write the proportion equation
68.18 : 102.36 = 66.96 : x - Step 2: Convert to fraction form
68.18/102.36 = 66.96/x - Step 3: Cross multiply
68.18x = 102.36 × 66.96 - Step 4: Simplify right side
68.18x = 6,854.03 - Step 5: Solve for x
x = 6,854.03/68.18 - Step 6: Final answer
x = 100.54
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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.