Finding the Fourth Proportional to 212,090.76, 318,136.14 and 85,786.92
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Solution
The fourth proportional to 212,090.76, 318,136.14 and 85,786.92 is: 128,680.38
Step by Step Solution
- Step 1: Write the proportion equation
212,090.76 : 318,136.14 = 85,786.92 : x - Step 2: Convert to fraction form
212,090.76/318,136.14 = 85,786.92/x - Step 3: Cross multiply
212,090.76x = 318,136.14 × 85,786.92 - Step 4: Simplify right side
212,090.76x = 27,291,919,591.29 - Step 5: Solve for x
x = 27,291,919,591.29/212,090.76 - Step 6: Final answer
x = 128,680.38
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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.