Finding the Fourth Proportional to 81,135.75, 121,723.07 and 25,731.75
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Solution
The fourth proportional to 81,135.75, 121,723.07 and 25,731.75 is: 38,603.79
Step by Step Solution
- Step 1: Write the proportion equation
81,135.75 : 121,723.07 = 25,731.75 : x - Step 2: Convert to fraction form
81,135.75/121,723.07 = 25,731.75/x - Step 3: Cross multiply
81,135.75x = 121,723.07 × 25,731.75 - Step 4: Simplify right side
81,135.75x = 3,132,147,477.81 - Step 5: Solve for x
x = 3,132,147,477.81/81,135.75 - Step 6: Final answer
x = 38,603.79
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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.