Finding the Fourth Proportional to 72.84, 109.15 and 34.26
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Solution
The fourth proportional to 72.84, 109.15 and 34.26 is: 51.34
Step by Step Solution
- Step 1: Write the proportion equation
72.84 : 109.15 = 34.26 : x - Step 2: Convert to fraction form
72.84/109.15 = 34.26/x - Step 3: Cross multiply
72.84x = 109.15 × 34.26 - Step 4: Simplify right side
72.84x = 3,739.48 - Step 5: Solve for x
x = 3,739.48/72.84 - Step 6: Final answer
x = 51.34
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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.