Finding the Fourth Proportional to 212,327.80, 318,491.70 and 85,967.80
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Solution
The fourth proportional to 212,327.80, 318,491.70 and 85,967.80 is: 128,951.70
Step by Step Solution
- Step 1: Write the proportion equation
212,327.80 : 318,491.70 = 85,967.80 : x - Step 2: Convert to fraction form
212,327.80/318,491.70 = 85,967.80/x - Step 3: Cross multiply
212,327.80x = 318,491.70 × 85,967.80 - Step 4: Simplify right side
212,327.80x = 27,380,030,767.26 - Step 5: Solve for x
x = 27,380,030,767.26/212,327.80 - Step 6: Final answer
x = 128,951.70
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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.