Finding the Fourth Proportional to 68.63, 102.74 and 64.79
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Solution
The fourth proportional to 68.63, 102.74 and 64.79 is: 96.99
Step by Step Solution
- Step 1: Write the proportion equation
68.63 : 102.74 = 64.79 : x - Step 2: Convert to fraction form
68.63/102.74 = 64.79/x - Step 3: Cross multiply
68.63x = 102.74 × 64.79 - Step 4: Simplify right side
68.63x = 6,655.69 - Step 5: Solve for x
x = 6,655.69/68.63 - Step 6: Final answer
x = 96.99
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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.