Finding the Fourth Proportional to 139.05, 208.17 and 93.15
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Solution
The fourth proportional to 139.05, 208.17 and 93.15 is: 139.45
Step by Step Solution
- Step 1: Write the proportion equation
139.05 : 208.17 = 93.15 : x - Step 2: Convert to fraction form
139.05/208.17 = 93.15/x - Step 3: Cross multiply
139.05x = 208.17 × 93.15 - Step 4: Simplify right side
139.05x = 19,391.04 - Step 5: Solve for x
x = 19,391.04/139.05 - Step 6: Final answer
x = 139.45
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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.