Finding the Fourth Proportional to 92.99, 139.26 and 47.28
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Solution
The fourth proportional to 92.99, 139.26 and 47.28 is: 70.81
Step by Step Solution
- Step 1: Write the proportion equation
92.99 : 139.26 = 47.28 : x - Step 2: Convert to fraction form
92.99/139.26 = 47.28/x - Step 3: Cross multiply
92.99x = 139.26 × 47.28 - Step 4: Simplify right side
92.99x = 6,584.21 - Step 5: Solve for x
x = 6,584.21/92.99 - Step 6: Final answer
x = 70.81
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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.