Finding the Fourth Proportional to 121,425.40, 181,943.70 and 79,823.80
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Solution
The fourth proportional to 121,425.40, 181,943.70 and 79,823.80 is: 119,607.90
Step by Step Solution
- Step 1: Write the proportion equation
121,425.40 : 181,943.70 = 79,823.80 : x - Step 2: Convert to fraction form
121,425.40/181,943.70 = 79,823.80/x - Step 3: Cross multiply
121,425.40x = 181,943.70 × 79,823.80 - Step 4: Simplify right side
121,425.40x = 14,523,437,520.06 - Step 5: Solve for x
x = 14,523,437,520.06/121,425.40 - Step 6: Final answer
x = 119,607.90
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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.