Finding the Fourth Proportional to 81,689.05, 122,558.19 and 29,091.70
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Solution
The fourth proportional to 81,689.05, 122,558.19 and 29,091.70 is: 43,646.32
Step by Step Solution
- Step 1: Write the proportion equation
81,689.05 : 122,558.19 = 29,091.70 : x - Step 2: Convert to fraction form
81,689.05/122,558.19 = 29,091.70/x - Step 3: Cross multiply
81,689.05x = 122,558.19 × 29,091.70 - Step 4: Simplify right side
81,689.05x = 3,565,426,096.02 - Step 5: Solve for x
x = 3,565,426,096.02/81,689.05 - Step 6: Final answer
x = 43,646.32
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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.