Finding the Fourth Proportional to 140.91, 211.36 and 68.75
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Solution
The fourth proportional to 140.91, 211.36 and 68.75 is: 103.12
Step by Step Solution
- Step 1: Write the proportion equation
140.91 : 211.36 = 68.75 : x - Step 2: Convert to fraction form
140.91/211.36 = 68.75/x - Step 3: Cross multiply
140.91x = 211.36 × 68.75 - Step 4: Simplify right side
140.91x = 14,531.00 - Step 5: Solve for x
x = 14,531.00/140.91 - Step 6: Final answer
x = 103.12
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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.