Finding the Fourth Proportional to 67.80, 101.76 and 50.70
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Solution
The fourth proportional to 67.80, 101.76 and 50.70 is: 76.09
Step by Step Solution
- Step 1: Write the proportion equation
67.80 : 101.76 = 50.70 : x - Step 2: Convert to fraction form
67.80/101.76 = 50.70/x - Step 3: Cross multiply
67.80x = 101.76 × 50.70 - Step 4: Simplify right side
67.80x = 5,159.23 - Step 5: Solve for x
x = 5,159.23/67.80 - Step 6: Final answer
x = 76.09
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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.