Finding the Fourth Proportional to 135,880.21, 187,520.09 and 78,517.63
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Solution
The fourth proportional to 135,880.21, 187,520.09 and 78,517.63 is: 108,357.45
Step by Step Solution
- Step 1: Write the proportion equation
135,880.21 : 187,520.09 = 78,517.63 : x - Step 2: Convert to fraction form
135,880.21/187,520.09 = 78,517.63/x - Step 3: Cross multiply
135,880.21x = 187,520.09 × 78,517.63 - Step 4: Simplify right side
135,880.21x = 14,723,632,651.60 - Step 5: Solve for x
x = 14,723,632,651.60/135,880.21 - Step 6: Final answer
x = 108,357.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.