Finding the Fourth Proportional to 101.37, 139.77 and 84.99
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Solution
The fourth proportional to 101.37, 139.77 and 84.99 is: 117.19
Step by Step Solution
- Step 1: Write the proportion equation
101.37 : 139.77 = 84.99 : x - Step 2: Convert to fraction form
101.37/139.77 = 84.99/x - Step 3: Cross multiply
101.37x = 139.77 × 84.99 - Step 4: Simplify right side
101.37x = 11,879.05 - Step 5: Solve for x
x = 11,879.05/101.37 - Step 6: Final answer
x = 117.19
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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.