Finding the Fourth Proportional to 87,915.39, 121,323.09 and 47,630.18
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Solution
The fourth proportional to 87,915.39, 121,323.09 and 47,630.18 is: 65,729.56
Step by Step Solution
- Step 1: Write the proportion equation
87,915.39 : 121,323.09 = 47,630.18 : x - Step 2: Convert to fraction form
87,915.39/121,323.09 = 47,630.18/x - Step 3: Cross multiply
87,915.39x = 121,323.09 × 47,630.18 - Step 4: Simplify right side
87,915.39x = 5,778,640,008.24 - Step 5: Solve for x
x = 5,778,640,008.24/87,915.39 - Step 6: Final answer
x = 65,729.56
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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.