Finding the Fourth Proportional to 81,239.48, 121,919.11 and 38,545.09
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Solution
The fourth proportional to 81,239.48, 121,919.11 and 38,545.09 is: 57,846.05
Step by Step Solution
- Step 1: Write the proportion equation
81,239.48 : 121,919.11 = 38,545.09 : x - Step 2: Convert to fraction form
81,239.48/121,919.11 = 38,545.09/x - Step 3: Cross multiply
81,239.48x = 121,919.11 × 38,545.09 - Step 4: Simplify right side
81,239.48x = 4,699,383,164.03 - Step 5: Solve for x
x = 4,699,383,164.03/81,239.48 - Step 6: Final answer
x = 57,846.05
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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.