Finding the Fourth Proportional to 108.64, 149.99 and 73.68
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Solution
The fourth proportional to 108.64, 149.99 and 73.68 is: 101.72
Step by Step Solution
- Step 1: Write the proportion equation
108.64 : 149.99 = 73.68 : x - Step 2: Convert to fraction form
108.64/149.99 = 73.68/x - Step 3: Cross multiply
108.64x = 149.99 × 73.68 - Step 4: Simplify right side
108.64x = 11,051.26 - Step 5: Solve for x
x = 11,051.26/108.64 - Step 6: Final answer
x = 101.72
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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.