Finding the Fourth Proportional to 129,586.90, 178,829.76 and 72,998.68
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Solution
The fourth proportional to 129,586.90, 178,829.76 and 72,998.68 is: 100,738.09
Step by Step Solution
- Step 1: Write the proportion equation
129,586.90 : 178,829.76 = 72,998.68 : x - Step 2: Convert to fraction form
129,586.90/178,829.76 = 72,998.68/x - Step 3: Cross multiply
129,586.90x = 178,829.76 × 72,998.68 - Step 4: Simplify right side
129,586.90x = 13,054,336,424.72 - Step 5: Solve for x
x = 13,054,336,424.72/129,586.90 - Step 6: Final answer
x = 100,738.09
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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.