Finding the Fourth Proportional to 145,857.75, 201,283.88 and 78,789.75
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Solution
The fourth proportional to 145,857.75, 201,283.88 and 78,789.75 is: 108,729.95
Step by Step Solution
- Step 1: Write the proportion equation
145,857.75 : 201,283.88 = 78,789.75 : x - Step 2: Convert to fraction form
145,857.75/201,283.88 = 78,789.75/x - Step 3: Cross multiply
145,857.75x = 201,283.88 × 78,789.75 - Step 4: Simplify right side
145,857.75x = 15,859,106,190.28 - Step 5: Solve for x
x = 15,859,106,190.28/145,857.75 - Step 6: Final answer
x = 108,729.95
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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.