Finding the Fourth Proportional to 68.49, 102.69 and 42.71
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Solution
The fourth proportional to 68.49, 102.69 and 42.71 is: 64.03
Step by Step Solution
- Step 1: Write the proportion equation
68.49 : 102.69 = 42.71 : x - Step 2: Convert to fraction form
68.49/102.69 = 42.71/x - Step 3: Cross multiply
68.49x = 102.69 × 42.71 - Step 4: Simplify right side
68.49x = 4,385.38 - Step 5: Solve for x
x = 4,385.38/68.49 - Step 6: Final answer
x = 64.03
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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.