Finding the Fourth Proportional to 68.52, 102.80 and 25.80
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Solution
The fourth proportional to 68.52, 102.80 and 25.80 is: 38.71
Step by Step Solution
- Step 1: Write the proportion equation
68.52 : 102.80 = 25.80 : x - Step 2: Convert to fraction form
68.52/102.80 = 25.80/x - Step 3: Cross multiply
68.52x = 102.80 × 25.80 - Step 4: Simplify right side
68.52x = 2,652.24 - Step 5: Solve for x
x = 2,652.24/68.52 - Step 6: Final answer
x = 38.71
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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.