Finding the Fourth Proportional to 130.74, 195.76 and 84.95
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Solution
The fourth proportional to 130.74, 195.76 and 84.95 is: 127.19
Step by Step Solution
- Step 1: Write the proportion equation
130.74 : 195.76 = 84.95 : x - Step 2: Convert to fraction form
130.74/195.76 = 84.95/x - Step 3: Cross multiply
130.74x = 195.76 × 84.95 - Step 4: Simplify right side
130.74x = 16,628.41 - Step 5: Solve for x
x = 16,628.41/130.74 - Step 6: Final answer
x = 127.19
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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.