Finding the Fourth Proportional to 138,624.80, 207,937.20 and 75,639.20
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Solution
The fourth proportional to 138,624.80, 207,937.20 and 75,639.20 is: 113,458.80
Step by Step Solution
- Step 1: Write the proportion equation
138,624.80 : 207,937.20 = 75,639.20 : x - Step 2: Convert to fraction form
138,624.80/207,937.20 = 75,639.20/x - Step 3: Cross multiply
138,624.80x = 207,937.20 × 75,639.20 - Step 4: Simplify right side
138,624.80x = 15,728,203,458.24 - Step 5: Solve for x
x = 15,728,203,458.24/138,624.80 - Step 6: Final answer
x = 113,458.80
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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.