Finding the Fourth Proportional to 129,487.58, 178,717.68 and 72,898.96
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Solution
The fourth proportional to 129,487.58, 178,717.68 and 72,898.96 is: 100,614.53
Step by Step Solution
- Step 1: Write the proportion equation
129,487.58 : 178,717.68 = 72,898.96 : x - Step 2: Convert to fraction form
129,487.58/178,717.68 = 72,898.96/x - Step 3: Cross multiply
129,487.58x = 178,717.68 × 72,898.96 - Step 4: Simplify right side
129,487.58x = 13,028,332,558.82 - Step 5: Solve for x
x = 13,028,332,558.82/129,487.58 - Step 6: Final answer
x = 100,614.53
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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.