Finding the Fourth Proportional to 72.55, 108.12 and 69.06
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Solution
The fourth proportional to 72.55, 108.12 and 69.06 is: 102.92
Step by Step Solution
- Step 1: Write the proportion equation
72.55 : 108.12 = 69.06 : x - Step 2: Convert to fraction form
72.55/108.12 = 69.06/x - Step 3: Cross multiply
72.55x = 108.12 × 69.06 - Step 4: Simplify right side
72.55x = 7,466.77 - Step 5: Solve for x
x = 7,466.77/72.55 - Step 6: Final answer
x = 102.92
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.