Finding the Fourth Proportional to 91,567.14, 137,974.64 and 75,291.75
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Solution
The fourth proportional to 91,567.14, 137,974.64 and 75,291.75 is: 113,450.65
Step by Step Solution
- Step 1: Write the proportion equation
91,567.14 : 137,974.64 = 75,291.75 : x - Step 2: Convert to fraction form
91,567.14/137,974.64 = 75,291.75/x - Step 3: Cross multiply
91,567.14x = 137,974.64 × 75,291.75 - Step 4: Simplify right side
91,567.14x = 10,388,351,724.76 - Step 5: Solve for x
x = 10,388,351,724.76/91,567.14 - Step 6: Final answer
x = 113,450.65
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.