Finding the Fourth Proportional to 83.72, 125.00 and 70.05
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Solution
The fourth proportional to 83.72, 125.00 and 70.05 is: 104.59
Step by Step Solution
- Step 1: Write the proportion equation
83.72 : 125.00 = 70.05 : x - Step 2: Convert to fraction form
83.72/125.00 = 70.05/x - Step 3: Cross multiply
83.72x = 125.00 × 70.05 - Step 4: Simplify right side
83.72x = 8,755.90 - Step 5: Solve for x
x = 8,755.90/83.72 - Step 6: Final answer
x = 104.59
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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.