Finding the Fourth Proportional to 122,129.20, 183,193.80 and 86,699.80
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Solution
The fourth proportional to 122,129.20, 183,193.80 and 86,699.80 is: 130,049.70
Step by Step Solution
- Step 1: Write the proportion equation
122,129.20 : 183,193.80 = 86,699.80 : x - Step 2: Convert to fraction form
122,129.20/183,193.80 = 86,699.80/x - Step 3: Cross multiply
122,129.20x = 183,193.80 × 86,699.80 - Step 4: Simplify right side
122,129.20x = 15,882,865,821.24 - Step 5: Solve for x
x = 15,882,865,821.24/122,129.20 - Step 6: Final answer
x = 130,049.70
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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.