Finding the Fourth Proportional to 122,128.20, 183,386.70 and 82,859.40
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Solution
The fourth proportional to 122,128.20, 183,386.70 and 82,859.40 is: 124,420.99
Step by Step Solution
- Step 1: Write the proportion equation
122,128.20 : 183,386.70 = 82,859.40 : x - Step 2: Convert to fraction form
122,128.20/183,386.70 = 82,859.40/x - Step 3: Cross multiply
122,128.20x = 183,386.70 × 82,859.40 - Step 4: Simplify right side
122,128.20x = 15,195,311,929.98 - Step 5: Solve for x
x = 15,195,311,929.98/122,128.20 - Step 6: Final answer
x = 124,420.99
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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.