Finding the Fourth Proportional to 99.08, 136.80 and 79.49
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Solution
The fourth proportional to 99.08, 136.80 and 79.49 is: 109.75
Step by Step Solution
- Step 1: Write the proportion equation
99.08 : 136.80 = 79.49 : x - Step 2: Convert to fraction form
99.08/136.80 = 79.49/x - Step 3: Cross multiply
99.08x = 136.80 × 79.49 - Step 4: Simplify right side
99.08x = 10,874.23 - Step 5: Solve for x
x = 10,874.23/99.08 - Step 6: Final answer
x = 109.75
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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.