Finding the Fourth Proportional to 91,289.36, 136,938.97 and 28,152.95
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Solution
The fourth proportional to 91,289.36, 136,938.97 and 28,152.95 is: 42,230.95
Step by Step Solution
- Step 1: Write the proportion equation
91,289.36 : 136,938.97 = 28,152.95 : x - Step 2: Convert to fraction form
91,289.36/136,938.97 = 28,152.95/x - Step 3: Cross multiply
91,289.36x = 136,938.97 × 28,152.95 - Step 4: Simplify right side
91,289.36x = 3,855,235,975.46 - Step 5: Solve for x
x = 3,855,235,975.46/91,289.36 - Step 6: Final answer
x = 42,230.95
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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.