Finding the Fourth Proportional to 79.60, 109.88 and 58.92
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Solution
The fourth proportional to 79.60, 109.88 and 58.92 is: 81.33
Step by Step Solution
- Step 1: Write the proportion equation
79.60 : 109.88 = 58.92 : x - Step 2: Convert to fraction form
79.60/109.88 = 58.92/x - Step 3: Cross multiply
79.60x = 109.88 × 58.92 - Step 4: Simplify right side
79.60x = 6,474.13 - Step 5: Solve for x
x = 6,474.13/79.60 - Step 6: Final answer
x = 81.33
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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.