Finding the Fourth Proportional to 91.84, 137.78 and 53.32
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Solution
The fourth proportional to 91.84, 137.78 and 53.32 is: 79.99
Step by Step Solution
- Step 1: Write the proportion equation
91.84 : 137.78 = 53.32 : x - Step 2: Convert to fraction form
91.84/137.78 = 53.32/x - Step 3: Cross multiply
91.84x = 137.78 × 53.32 - Step 4: Simplify right side
91.84x = 7,346.43 - Step 5: Solve for x
x = 7,346.43/91.84 - Step 6: Final answer
x = 79.99
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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.