Finding the Fourth Proportional to 135,909.20, 203,863.80 and 100,479.80
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Solution
The fourth proportional to 135,909.20, 203,863.80 and 100,479.80 is: 150,719.70
Step by Step Solution
- Step 1: Write the proportion equation
135,909.20 : 203,863.80 = 100,479.80 : x - Step 2: Convert to fraction form
135,909.20/203,863.80 = 100,479.80/x - Step 3: Cross multiply
135,909.20x = 203,863.80 × 100,479.80 - Step 4: Simplify right side
135,909.20x = 20,484,193,851.24 - Step 5: Solve for x
x = 20,484,193,851.24/135,909.20 - Step 6: Final answer
x = 150,719.70
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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.