Finding the Fourth Proportional to 156,138.19, 215,470.80 and 84,518.80
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Solution
The fourth proportional to 156,138.19, 215,470.80 and 84,518.80 is: 116,636.00
Step by Step Solution
- Step 1: Write the proportion equation
156,138.19 : 215,470.80 = 84,518.80 : x - Step 2: Convert to fraction form
156,138.19/215,470.80 = 84,518.80/x - Step 3: Cross multiply
156,138.19x = 215,470.80 × 84,518.80 - Step 4: Simplify right side
156,138.19x = 18,211,332,912.36 - Step 5: Solve for x
x = 18,211,332,912.36/156,138.19 - Step 6: Final answer
x = 116,636.00
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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.