Finding the Fourth Proportional to 81,031.68, 121,566.96 and 31,112.19
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Solution
The fourth proportional to 81,031.68, 121,566.96 and 31,112.19 is: 46,675.75
Step by Step Solution
- Step 1: Write the proportion equation
81,031.68 : 121,566.96 = 31,112.19 : x - Step 2: Convert to fraction form
81,031.68/121,566.96 = 31,112.19/x - Step 3: Cross multiply
81,031.68x = 121,566.96 × 31,112.19 - Step 4: Simplify right side
81,031.68x = 3,782,214,357.24 - Step 5: Solve for x
x = 3,782,214,357.24/81,031.68 - Step 6: Final answer
x = 46,675.75
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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.