Finding the Fourth Proportional to 91.08, 136.64 and 42.96
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Solution
The fourth proportional to 91.08, 136.64 and 42.96 is: 64.45
Step by Step Solution
- Step 1: Write the proportion equation
91.08 : 136.64 = 42.96 : x - Step 2: Convert to fraction form
91.08/136.64 = 42.96/x - Step 3: Cross multiply
91.08x = 136.64 × 42.96 - Step 4: Simplify right side
91.08x = 5,870.05 - Step 5: Solve for x
x = 5,870.05/91.08 - Step 6: Final answer
x = 64.45
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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.