Finding the Fourth Proportional to 99.91, 149.92 and 73.08
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Solution
The fourth proportional to 99.91, 149.92 and 73.08 is: 109.66
Step by Step Solution
- Step 1: Write the proportion equation
99.91 : 149.92 = 73.08 : x - Step 2: Convert to fraction form
99.91/149.92 = 73.08/x - Step 3: Cross multiply
99.91x = 149.92 × 73.08 - Step 4: Simplify right side
99.91x = 10,956.15 - Step 5: Solve for x
x = 10,956.15/99.91 - Step 6: Final answer
x = 109.66
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.