Finding the Fourth Proportional to 68.58, 102.09 and 68.18
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Solution
The fourth proportional to 68.58, 102.09 and 68.18 is: 101.49
Step by Step Solution
- Step 1: Write the proportion equation
68.58 : 102.09 = 68.18 : x - Step 2: Convert to fraction form
68.58/102.09 = 68.18/x - Step 3: Cross multiply
68.58x = 102.09 × 68.18 - Step 4: Simplify right side
68.58x = 6,960.24 - Step 5: Solve for x
x = 6,960.24/68.58 - Step 6: Final answer
x = 101.49
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.