Finding the Fourth Proportional to 129,342.36, 178,457.46 and 75,640.62
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Solution
The fourth proportional to 129,342.36, 178,457.46 and 75,640.62 is: 104,363.59
Step by Step Solution
- Step 1: Write the proportion equation
129,342.36 : 178,457.46 = 75,640.62 : x - Step 2: Convert to fraction form
129,342.36/178,457.46 = 75,640.62/x - Step 3: Cross multiply
129,342.36x = 178,457.46 × 75,640.62 - Step 4: Simplify right side
129,342.36x = 13,498,632,918.03 - Step 5: Solve for x
x = 13,498,632,918.03/129,342.36 - Step 6: Final answer
x = 104,363.59
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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.