Finding the Fourth Proportional to 129,722.07, 178,948.36 and 105,550.02
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Solution
The fourth proportional to 129,722.07, 178,948.36 and 105,550.02 is: 145,603.62
Step by Step Solution
- Step 1: Write the proportion equation
129,722.07 : 178,948.36 = 105,550.02 : x - Step 2: Convert to fraction form
129,722.07/178,948.36 = 105,550.02/x - Step 3: Cross multiply
129,722.07x = 178,948.36 × 105,550.02 - Step 4: Simplify right side
129,722.07x = 18,888,002,976.97 - Step 5: Solve for x
x = 18,888,002,976.97/129,722.07 - Step 6: Final answer
x = 145,603.62
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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.