Finding the Fourth Proportional to 163,936.80, 245,751.60 and 128,378.40
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Solution
The fourth proportional to 163,936.80, 245,751.60 and 128,378.40 is: 192,447.32
Step by Step Solution
- Step 1: Write the proportion equation
163,936.80 : 245,751.60 = 128,378.40 : x - Step 2: Convert to fraction form
163,936.80/245,751.60 = 128,378.40/x - Step 3: Cross multiply
163,936.80x = 245,751.60 × 128,378.40 - Step 4: Simplify right side
163,936.80x = 31,549,197,205.44 - Step 5: Solve for x
x = 31,549,197,205.44/163,936.80 - Step 6: Final answer
x = 192,447.32
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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.