Finding the Fourth Proportional to 68.66, 102.99 and 63.80
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Solution
The fourth proportional to 68.66, 102.99 and 63.80 is: 95.69
Step by Step Solution
- Step 1: Write the proportion equation
68.66 : 102.99 = 63.80 : x - Step 2: Convert to fraction form
68.66/102.99 = 63.80/x - Step 3: Cross multiply
68.66x = 102.99 × 63.80 - Step 4: Simplify right side
68.66x = 6,569.93 - Step 5: Solve for x
x = 6,569.93/68.66 - Step 6: Final answer
x = 95.69
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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.