Finding the Fourth Proportional to 163,542.20, 245,313.30 and 128,112.80
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Solution
The fourth proportional to 163,542.20, 245,313.30 and 128,112.80 is: 192,169.20
Step by Step Solution
- Step 1: Write the proportion equation
163,542.20 : 245,313.30 = 128,112.80 : x - Step 2: Convert to fraction form
163,542.20/245,313.30 = 128,112.80/x - Step 3: Cross multiply
163,542.20x = 245,313.30 × 128,112.80 - Step 4: Simplify right side
163,542.20x = 31,427,773,740.24 - Step 5: Solve for x
x = 31,427,773,740.24/163,542.20 - Step 6: Final answer
x = 192,169.20
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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.