Finding the Fourth Proportional to 81,290.99, 121,975.36 and 28,725.23
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Solution
The fourth proportional to 81,290.99, 121,975.36 and 28,725.23 is: 43,101.58
Step by Step Solution
- Step 1: Write the proportion equation
81,290.99 : 121,975.36 = 28,725.23 : x - Step 2: Convert to fraction form
81,290.99/121,975.36 = 28,725.23/x - Step 3: Cross multiply
81,290.99x = 121,975.36 × 28,725.23 - Step 4: Simplify right side
81,290.99x = 3,503,770,270.33 - Step 5: Solve for x
x = 3,503,770,270.33/81,290.99 - Step 6: Final answer
x = 43,101.58
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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.