Finding the Fourth Proportional to 99.44, 137.35 and 78.99
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Solution
The fourth proportional to 99.44, 137.35 and 78.99 is: 109.10
Step by Step Solution
- Step 1: Write the proportion equation
99.44 : 137.35 = 78.99 : x - Step 2: Convert to fraction form
99.44/137.35 = 78.99/x - Step 3: Cross multiply
99.44x = 137.35 × 78.99 - Step 4: Simplify right side
99.44x = 10,849.28 - Step 5: Solve for x
x = 10,849.28/99.44 - Step 6: Final answer
x = 109.10
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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.