Finding the Fourth Proportional to 212,720.40, 319,080.60 and 107,525.70
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Solution
The fourth proportional to 212,720.40, 319,080.60 and 107,525.70 is: 161,288.55
Step by Step Solution
- Step 1: Write the proportion equation
212,720.40 : 319,080.60 = 107,525.70 : x - Step 2: Convert to fraction form
212,720.40/319,080.60 = 107,525.70/x - Step 3: Cross multiply
212,720.40x = 319,080.60 × 107,525.70 - Step 4: Simplify right side
212,720.40x = 34,309,364,871.42 - Step 5: Solve for x
x = 34,309,364,871.42/212,720.40 - Step 6: Final answer
x = 161,288.55
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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.