Finding the Fourth Proportional to 138,800.70, 191,544.75 and 75,138.48
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Solution
The fourth proportional to 138,800.70, 191,544.75 and 75,138.48 is: 103,690.99
Step by Step Solution
- Step 1: Write the proportion equation
138,800.70 : 191,544.75 = 75,138.48 : x - Step 2: Convert to fraction form
138,800.70/191,544.75 = 75,138.48/x - Step 3: Cross multiply
138,800.70x = 191,544.75 × 75,138.48 - Step 4: Simplify right side
138,800.70x = 14,392,381,366.98 - Step 5: Solve for x
x = 14,392,381,366.98/138,800.70 - Step 6: Final answer
x = 103,690.99
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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.