Finding the Fourth Proportional to 77.40, 106.79 and 58.95
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Solution
The fourth proportional to 77.40, 106.79 and 58.95 is: 81.33
Step by Step Solution
- Step 1: Write the proportion equation
77.40 : 106.79 = 58.95 : x - Step 2: Convert to fraction form
77.40/106.79 = 58.95/x - Step 3: Cross multiply
77.40x = 106.79 × 58.95 - Step 4: Simplify right side
77.40x = 6,294.98 - Step 5: Solve for x
x = 6,294.98/77.40 - Step 6: Final answer
x = 81.33
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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.