Finding the Fourth Proportional to 139,842.18, 192,983.45 and 79,414.07
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Solution
The fourth proportional to 139,842.18, 192,983.45 and 79,414.07 is: 109,592.11
Step by Step Solution
- Step 1: Write the proportion equation
139,842.18 : 192,983.45 = 79,414.07 : x - Step 2: Convert to fraction form
139,842.18/192,983.45 = 79,414.07/x - Step 3: Cross multiply
139,842.18x = 192,983.45 × 79,414.07 - Step 4: Simplify right side
139,842.18x = 15,325,599,845.15 - Step 5: Solve for x
x = 15,325,599,845.15/139,842.18 - Step 6: Final answer
x = 109,592.11
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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.