Finding the Fourth Proportional to 81,247.80, 121,634.10 and 57,919.80
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Solution
The fourth proportional to 81,247.80, 121,634.10 and 57,919.80 is: 86,710.32
Step by Step Solution
- Step 1: Write the proportion equation
81,247.80 : 121,634.10 = 57,919.80 : x - Step 2: Convert to fraction form
81,247.80/121,634.10 = 57,919.80/x - Step 3: Cross multiply
81,247.80x = 121,634.10 × 57,919.80 - Step 4: Simplify right side
81,247.80x = 7,045,022,745.18 - Step 5: Solve for x
x = 7,045,022,745.18/81,247.80 - Step 6: Final answer
x = 86,710.32
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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.