Finding the Fourth Proportional to 138,953.21, 191,756.09 and 75,290.99
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Solution
The fourth proportional to 138,953.21, 191,756.09 and 75,290.99 is: 103,901.92
Step by Step Solution
- Step 1: Write the proportion equation
138,953.21 : 191,756.09 = 75,290.99 : x - Step 2: Convert to fraction form
138,953.21/191,756.09 = 75,290.99/x - Step 3: Cross multiply
138,953.21x = 191,756.09 × 75,290.99 - Step 4: Simplify right side
138,953.21x = 14,437,505,084.08 - Step 5: Solve for x
x = 14,437,505,084.08/138,953.21 - Step 6: Final answer
x = 103,901.92
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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.