Finding the Fourth Proportional to 71,129.67, 106,723.19 and 31,659.79
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Solution
The fourth proportional to 71,129.67, 106,723.19 and 31,659.79 is: 47,502.45
Step by Step Solution
- Step 1: Write the proportion equation
71,129.67 : 106,723.19 = 31,659.79 : x - Step 2: Convert to fraction form
71,129.67/106,723.19 = 31,659.79/x - Step 3: Cross multiply
71,129.67x = 106,723.19 × 31,659.79 - Step 4: Simplify right side
71,129.67x = 3,378,833,595.87 - Step 5: Solve for x
x = 3,378,833,595.87/71,129.67 - Step 6: Final answer
x = 47,502.45
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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.