Finding the Fourth Proportional to 154,917.86, 213,790.88 and 86,938.99
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Solution
The fourth proportional to 154,917.86, 213,790.88 and 86,938.99 is: 119,978.18
Step by Step Solution
- Step 1: Write the proportion equation
154,917.86 : 213,790.88 = 86,938.99 : x - Step 2: Convert to fraction form
154,917.86/213,790.88 = 86,938.99/x - Step 3: Cross multiply
154,917.86x = 213,790.88 × 86,938.99 - Step 4: Simplify right side
154,917.86x = 18,586,762,861.28 - Step 5: Solve for x
x = 18,586,762,861.28/154,917.86 - Step 6: Final answer
x = 119,978.18
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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.