Finding the Fourth Proportional to 156,138.82, 215,471.70 and 84,518.62
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Solution
The fourth proportional to 156,138.82, 215,471.70 and 84,518.62 is: 116,635.77
Step by Step Solution
- Step 1: Write the proportion equation
156,138.82 : 215,471.70 = 84,518.62 : x - Step 2: Convert to fraction form
156,138.82/215,471.70 = 84,518.62/x - Step 3: Cross multiply
156,138.82x = 215,471.70 × 84,518.62 - Step 4: Simplify right side
156,138.82x = 18,211,370,733.05 - Step 5: Solve for x
x = 18,211,370,733.05/156,138.82 - Step 6: Final answer
x = 116,635.77
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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.