Finding the Fourth Proportional to 61.13, 91.72 and 43.09
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Solution
The fourth proportional to 61.13, 91.72 and 43.09 is: 64.65
Step by Step Solution
- Step 1: Write the proportion equation
61.13 : 91.72 = 43.09 : x - Step 2: Convert to fraction form
61.13/91.72 = 43.09/x - Step 3: Cross multiply
61.13x = 91.72 × 43.09 - Step 4: Simplify right side
61.13x = 3,952.21 - Step 5: Solve for x
x = 3,952.21/61.13 - Step 6: Final answer
x = 64.65
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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.