Finding the Fourth Proportional to 99.84, 137.61 and 73.92
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Solution
The fourth proportional to 99.84, 137.61 and 73.92 is: 101.88
Step by Step Solution
- Step 1: Write the proportion equation
99.84 : 137.61 = 73.92 : x - Step 2: Convert to fraction form
99.84/137.61 = 73.92/x - Step 3: Cross multiply
99.84x = 137.61 × 73.92 - Step 4: Simplify right side
99.84x = 10,172.13 - Step 5: Solve for x
x = 10,172.13/99.84 - Step 6: Final answer
x = 101.88
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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.