Finding the Fourth Proportional to 122,121.49, 168,609.90 and 76,250.98
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Solution
The fourth proportional to 122,121.49, 168,609.90 and 76,250.98 is: 105,277.70
Step by Step Solution
- Step 1: Write the proportion equation
122,121.49 : 168,609.90 = 76,250.98 : x - Step 2: Convert to fraction form
122,121.49/168,609.90 = 76,250.98/x - Step 3: Cross multiply
122,121.49x = 168,609.90 × 76,250.98 - Step 4: Simplify right side
122,121.49x = 12,856,669,269.65 - Step 5: Solve for x
x = 12,856,669,269.65/122,121.49 - Step 6: Final answer
x = 105,277.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.