Finding the Fourth Proportional to 91,138.28, 136,706.60 and 28,808.80
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Solution
The fourth proportional to 91,138.28, 136,706.60 and 28,808.80 is: 43,212.94
Step by Step Solution
- Step 1: Write the proportion equation
91,138.28 : 136,706.60 = 28,808.80 : x - Step 2: Convert to fraction form
91,138.28/136,706.60 = 28,808.80/x - Step 3: Cross multiply
91,138.28x = 136,706.60 × 28,808.80 - Step 4: Simplify right side
91,138.28x = 3,938,353,098.08 - Step 5: Solve for x
x = 3,938,353,098.08/91,138.28 - Step 6: Final answer
x = 43,212.94
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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.