Finding the Fourth Proportional to 79.09, 109.17 and 49.99
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Solution
The fourth proportional to 79.09, 109.17 and 49.99 is: 69.00
Step by Step Solution
- Step 1: Write the proportion equation
79.09 : 109.17 = 49.99 : x - Step 2: Convert to fraction form
79.09/109.17 = 49.99/x - Step 3: Cross multiply
79.09x = 109.17 × 49.99 - Step 4: Simplify right side
79.09x = 5,457.41 - Step 5: Solve for x
x = 5,457.41/79.09 - Step 6: Final answer
x = 69.00
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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.