Finding the Fourth Proportional to 139,672.87, 192,789.18 and 91,282.08
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Solution
The fourth proportional to 139,672.87, 192,789.18 and 91,282.08 is: 125,995.81
Step by Step Solution
- Step 1: Write the proportion equation
139,672.87 : 192,789.18 = 91,282.08 : x - Step 2: Convert to fraction form
139,672.87/192,789.18 = 91,282.08/x - Step 3: Cross multiply
139,672.87x = 192,789.18 × 91,282.08 - Step 4: Simplify right side
139,672.87x = 17,598,196,334.21 - Step 5: Solve for x
x = 17,598,196,334.21/139,672.87 - Step 6: Final answer
x = 125,995.81
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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.