Finding the Fourth Proportional to 218,799.36, 302,043.92 and 128,142.72
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Solution
The fourth proportional to 218,799.36, 302,043.92 and 128,142.72 is: 176,895.99
Step by Step Solution
- Step 1: Write the proportion equation
218,799.36 : 302,043.92 = 128,142.72 : x - Step 2: Convert to fraction form
218,799.36/302,043.92 = 128,142.72/x - Step 3: Cross multiply
218,799.36x = 302,043.92 × 128,142.72 - Step 4: Simplify right side
218,799.36x = 38,704,729,468.26 - Step 5: Solve for x
x = 38,704,729,468.26/218,799.36 - Step 6: Final answer
x = 176,895.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.