Finding the Fourth Proportional to 84,007.20, 125,881.20 and 72,861.60
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Solution
The fourth proportional to 84,007.20, 125,881.20 and 72,861.60 is: 109,179.99
Step by Step Solution
- Step 1: Write the proportion equation
84,007.20 : 125,881.20 = 72,861.60 : x - Step 2: Convert to fraction form
84,007.20/125,881.20 = 72,861.60/x - Step 3: Cross multiply
84,007.20x = 125,881.20 × 72,861.60 - Step 4: Simplify right side
84,007.20x = 9,171,905,641.92 - Step 5: Solve for x
x = 9,171,905,641.92/84,007.20 - Step 6: Final answer
x = 109,179.99
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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.