Finding the Fourth Proportional to 83.99, 115.88 and 77.08
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Solution
The fourth proportional to 83.99, 115.88 and 77.08 is: 106.35
Step by Step Solution
- Step 1: Write the proportion equation
83.99 : 115.88 = 77.08 : x - Step 2: Convert to fraction form
83.99/115.88 = 77.08/x - Step 3: Cross multiply
83.99x = 115.88 × 77.08 - Step 4: Simplify right side
83.99x = 8,931.68 - Step 5: Solve for x
x = 8,931.68/83.99 - Step 6: Final answer
x = 106.35
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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.