Finding the Fourth Proportional to 99,497.20, 149,245.80 and 90,311.80
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Solution
The fourth proportional to 99,497.20, 149,245.80 and 90,311.80 is: 135,467.70
Step by Step Solution
- Step 1: Write the proportion equation
99,497.20 : 149,245.80 = 90,311.80 : x - Step 2: Convert to fraction form
99,497.20/149,245.80 = 90,311.80/x - Step 3: Cross multiply
99,497.20x = 149,245.80 × 90,311.80 - Step 4: Simplify right side
99,497.20x = 13,478,656,840.44 - Step 5: Solve for x
x = 13,478,656,840.44/99,497.20 - Step 6: Final answer
x = 135,467.70
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1.5x scale
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.