Finding the Fourth Proportional to 129,880.80, 194,821.20 and 70,831.80
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Solution
The fourth proportional to 129,880.80, 194,821.20 and 70,831.80 is: 106,247.70
Step by Step Solution
- Step 1: Write the proportion equation
129,880.80 : 194,821.20 = 70,831.80 : x - Step 2: Convert to fraction form
129,880.80/194,821.20 = 70,831.80/x - Step 3: Cross multiply
129,880.80x = 194,821.20 × 70,831.80 - Step 4: Simplify right side
129,880.80x = 13,799,536,274.16 - Step 5: Solve for x
x = 13,799,536,274.16/129,880.80 - Step 6: Final answer
x = 106,247.70
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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.