Finding the Fourth Proportional to 75.22, 103.62 and 68.02
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Solution
The fourth proportional to 75.22, 103.62 and 68.02 is: 93.70
Step by Step Solution
- Step 1: Write the proportion equation
75.22 : 103.62 = 68.02 : x - Step 2: Convert to fraction form
75.22/103.62 = 68.02/x - Step 3: Cross multiply
75.22x = 103.62 × 68.02 - Step 4: Simplify right side
75.22x = 7,048.23 - Step 5: Solve for x
x = 7,048.23/75.22 - Step 6: Final answer
x = 93.70
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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.