Finding the Fourth Proportional to 138,789.21, 191,528.96 and 75,126.99
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Solution
The fourth proportional to 138,789.21, 191,528.96 and 75,126.99 is: 103,675.16
Step by Step Solution
- Step 1: Write the proportion equation
138,789.21 : 191,528.96 = 75,126.99 : x - Step 2: Convert to fraction form
138,789.21/191,528.96 = 75,126.99/x - Step 3: Cross multiply
138,789.21x = 191,528.96 × 75,126.99 - Step 4: Simplify right side
138,789.21x = 14,388,993,887.00 - Step 5: Solve for x
x = 14,388,993,887.00/138,789.21 - Step 6: Final answer
x = 103,675.16
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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.