Finding the Fourth Proportional to 129,721.57, 179,016.82 and 72,358.99
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Solution
The fourth proportional to 129,721.57, 179,016.82 and 72,358.99 is: 99,855.99
Step by Step Solution
- Step 1: Write the proportion equation
129,721.57 : 179,016.82 = 72,358.99 : x - Step 2: Convert to fraction form
129,721.57/179,016.82 = 72,358.99/x - Step 3: Cross multiply
129,721.57x = 179,016.82 × 72,358.99 - Step 4: Simplify right side
129,721.57x = 12,953,475,659.77 - Step 5: Solve for x
x = 12,953,475,659.77/129,721.57 - Step 6: Final answer
x = 99,855.99
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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.