Finding the Fourth Proportional to 84.08, 125.84 and 68.70
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Solution
The fourth proportional to 84.08, 125.84 and 68.70 is: 102.82
Step by Step Solution
- Step 1: Write the proportion equation
84.08 : 125.84 = 68.70 : x - Step 2: Convert to fraction form
84.08/125.84 = 68.70/x - Step 3: Cross multiply
84.08x = 125.84 × 68.70 - Step 4: Simplify right side
84.08x = 8,645.21 - Step 5: Solve for x
x = 8,645.21/84.08 - Step 6: Final answer
x = 102.82
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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.