Finding the Fourth Proportional to 81,448.60, 122,129.70 and 28,859.80
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Solution
The fourth proportional to 81,448.60, 122,129.70 and 28,859.80 is: 43,274.39
Step by Step Solution
- Step 1: Write the proportion equation
81,448.60 : 122,129.70 = 28,859.80 : x - Step 2: Convert to fraction form
81,448.60/122,129.70 = 28,859.80/x - Step 3: Cross multiply
81,448.60x = 122,129.70 × 28,859.80 - Step 4: Simplify right side
81,448.60x = 3,524,638,716.06 - Step 5: Solve for x
x = 3,524,638,716.06/81,448.60 - Step 6: Final answer
x = 43,274.39
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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.