Finding the Fourth Proportional to 68.62, 102.15 and 68.26
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Solution
The fourth proportional to 68.62, 102.15 and 68.26 is: 101.61
Step by Step Solution
- Step 1: Write the proportion equation
68.62 : 102.15 = 68.26 : x - Step 2: Convert to fraction form
68.62/102.15 = 68.26/x - Step 3: Cross multiply
68.62x = 102.15 × 68.26 - Step 4: Simplify right side
68.62x = 6,972.76 - Step 5: Solve for x
x = 6,972.76/68.62 - Step 6: Final answer
x = 101.61
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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.