Finding the Fourth Proportional to 81.94, 112.99 and 58.59
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Solution
The fourth proportional to 81.94, 112.99 and 58.59 is: 80.79
Step by Step Solution
- Step 1: Write the proportion equation
81.94 : 112.99 = 58.59 : x - Step 2: Convert to fraction form
81.94/112.99 = 58.59/x - Step 3: Cross multiply
81.94x = 112.99 × 58.59 - Step 4: Simplify right side
81.94x = 6,620.08 - Step 5: Solve for x
x = 6,620.08/81.94 - Step 6: Final answer
x = 80.79
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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.