Finding the Fourth Proportional to 117,129.96, 161,528.70 and 76,878.63
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Solution
The fourth proportional to 117,129.96, 161,528.70 and 76,878.63 is: 106,019.89
Step by Step Solution
- Step 1: Write the proportion equation
117,129.96 : 161,528.70 = 76,878.63 : x - Step 2: Convert to fraction form
117,129.96/161,528.70 = 76,878.63/x - Step 3: Cross multiply
117,129.96x = 161,528.70 × 76,878.63 - Step 4: Simplify right side
117,129.96x = 12,418,105,161.68 - Step 5: Solve for x
x = 12,418,105,161.68/117,129.96 - Step 6: Final answer
x = 106,019.89
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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.