Finding the Fourth Proportional to 100,692.24, 138,952.49 and 55,370.31
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Solution
The fourth proportional to 100,692.24, 138,952.49 and 55,370.31 is: 76,409.48
Step by Step Solution
- Step 1: Write the proportion equation
100,692.24 : 138,952.49 = 55,370.31 : x - Step 2: Convert to fraction form
100,692.24/138,952.49 = 55,370.31/x - Step 3: Cross multiply
100,692.24x = 138,952.49 × 55,370.31 - Step 4: Simplify right side
100,692.24x = 7,693,842,169.72 - Step 5: Solve for x
x = 7,693,842,169.72/100,692.24 - Step 6: Final answer
x = 76,409.48
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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.