Finding the Fourth Proportional to 97.20, 145.80 and 83.99
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Solution
The fourth proportional to 97.20, 145.80 and 83.99 is: 125.99
Step by Step Solution
- Step 1: Write the proportion equation
97.20 : 145.80 = 83.99 : x - Step 2: Convert to fraction form
97.20/145.80 = 83.99/x - Step 3: Cross multiply
97.20x = 145.80 × 83.99 - Step 4: Simplify right side
97.20x = 12,245.74 - Step 5: Solve for x
x = 12,245.74/97.20 - Step 6: Final answer
x = 125.99
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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.