Finding the Fourth Proportional to 86,651.63, 129,977.46 and 31,247.63
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Solution
The fourth proportional to 86,651.63, 129,977.46 and 31,247.63 is: 46,871.45
Step by Step Solution
- Step 1: Write the proportion equation
86,651.63 : 129,977.46 = 31,247.63 : x - Step 2: Convert to fraction form
86,651.63/129,977.46 = 31,247.63/x - Step 3: Cross multiply
86,651.63x = 129,977.46 × 31,247.63 - Step 4: Simplify right side
86,651.63x = 4,061,486,928.53 - Step 5: Solve for x
x = 4,061,486,928.53/86,651.63 - Step 6: Final answer
x = 46,871.45
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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.