Finding the Fourth Proportional to 212,611.80, 318,917.70 and 86,251.80
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Solution
The fourth proportional to 212,611.80, 318,917.70 and 86,251.80 is: 129,377.70
Step by Step Solution
- Step 1: Write the proportion equation
212,611.80 : 318,917.70 = 86,251.80 : x - Step 2: Convert to fraction form
212,611.80/318,917.70 = 86,251.80/x - Step 3: Cross multiply
212,611.80x = 318,917.70 × 86,251.80 - Step 4: Simplify right side
212,611.80x = 27,507,225,676.86 - Step 5: Solve for x
x = 27,507,225,676.86/212,611.80 - Step 6: Final answer
x = 129,377.70
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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.