Finding the Fourth Proportional to 81,691.06, 122,561.20 and 29,093.70
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Solution
The fourth proportional to 81,691.06, 122,561.20 and 29,093.70 is: 43,649.31
Step by Step Solution
- Step 1: Write the proportion equation
81,691.06 : 122,561.20 = 29,093.70 : x - Step 2: Convert to fraction form
81,691.06/122,561.20 = 29,093.70/x - Step 3: Cross multiply
81,691.06x = 122,561.20 × 29,093.70 - Step 4: Simplify right side
81,691.06x = 3,565,758,784.44 - Step 5: Solve for x
x = 3,565,758,784.44/81,691.06 - Step 6: Final answer
x = 43,649.31
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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.