Finding the Fourth Proportional to 100.95, 139.27 and 57.26
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Solution
The fourth proportional to 100.95, 139.27 and 57.26 is: 78.99
Step by Step Solution
- Step 1: Write the proportion equation
100.95 : 139.27 = 57.26 : x - Step 2: Convert to fraction form
100.95/139.27 = 57.26/x - Step 3: Cross multiply
100.95x = 139.27 × 57.26 - Step 4: Simplify right side
100.95x = 7,974.13 - Step 5: Solve for x
x = 7,974.13/100.95 - Step 6: Final answer
x = 78.99
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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.