Finding the Fourth Proportional to 91.33, 136.99 and 47.99
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Solution
The fourth proportional to 91.33, 136.99 and 47.99 is: 71.99
Step by Step Solution
- Step 1: Write the proportion equation
91.33 : 136.99 = 47.99 : x - Step 2: Convert to fraction form
91.33/136.99 = 47.99/x - Step 3: Cross multiply
91.33x = 136.99 × 47.99 - Step 4: Simplify right side
91.33x = 6,574.55 - Step 5: Solve for x
x = 6,574.55/91.33 - Step 6: Final answer
x = 71.99
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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.