Finding the Fourth Proportional to 91.08, 125.70 and 49.64
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Solution
The fourth proportional to 91.08, 125.70 and 49.64 is: 68.50
Step by Step Solution
- Step 1: Write the proportion equation
91.08 : 125.70 = 49.64 : x - Step 2: Convert to fraction form
91.08/125.70 = 49.64/x - Step 3: Cross multiply
91.08x = 125.70 × 49.64 - Step 4: Simplify right side
91.08x = 6,239.19 - Step 5: Solve for x
x = 6,239.19/91.08 - Step 6: Final answer
x = 68.50
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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.