Finding the Fourth Proportional to 79.74, 109.97 and 57.87
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Solution
The fourth proportional to 79.74, 109.97 and 57.87 is: 79.80
Step by Step Solution
- Step 1: Write the proportion equation
79.74 : 109.97 = 57.87 : x - Step 2: Convert to fraction form
79.74/109.97 = 57.87/x - Step 3: Cross multiply
79.74x = 109.97 × 57.87 - Step 4: Simplify right side
79.74x = 6,363.26 - Step 5: Solve for x
x = 6,363.26/79.74 - Step 6: Final answer
x = 79.80
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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.