Finding the Fourth Proportional to 135,915.20, 203,872.80 and 47,139.20
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Solution
The fourth proportional to 135,915.20, 203,872.80 and 47,139.20 is: 70,708.80
Step by Step Solution
- Step 1: Write the proportion equation
135,915.20 : 203,872.80 = 47,139.20 : x - Step 2: Convert to fraction form
135,915.20/203,872.80 = 47,139.20/x - Step 3: Cross multiply
135,915.20x = 203,872.80 × 47,139.20 - Step 4: Simplify right side
135,915.20x = 9,610,400,693.76 - Step 5: Solve for x
x = 9,610,400,693.76/135,915.20 - Step 6: Final answer
x = 70,708.80
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1.5x scale
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.