Finding the Fourth Proportional to 140.28, 210.26 and 79.36
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Solution
The fourth proportional to 140.28, 210.26 and 79.36 is: 118.95
Step by Step Solution
- Step 1: Write the proportion equation
140.28 : 210.26 = 79.36 : x - Step 2: Convert to fraction form
140.28/210.26 = 79.36/x - Step 3: Cross multiply
140.28x = 210.26 × 79.36 - Step 4: Simplify right side
140.28x = 16,686.23 - Step 5: Solve for x
x = 16,686.23/140.28 - Step 6: Final answer
x = 118.95
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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.