Finding the Fourth Proportional to 138,472.24, 191,091.36 and 74,809.84
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Solution
The fourth proportional to 138,472.24, 191,091.36 and 74,809.84 is: 103,237.40
Step by Step Solution
- Step 1: Write the proportion equation
138,472.24 : 191,091.36 = 74,809.84 : x - Step 2: Convert to fraction form
138,472.24/191,091.36 = 74,809.84/x - Step 3: Cross multiply
138,472.24x = 191,091.36 × 74,809.84 - Step 4: Simplify right side
138,472.24x = 14,295,514,066.98 - Step 5: Solve for x
x = 14,295,514,066.98/138,472.24 - Step 6: Final answer
x = 103,237.40
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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.