Finding the Fourth Proportional to 100.83, 139.17 and 68.09
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Solution
The fourth proportional to 100.83, 139.17 and 68.09 is: 93.98
Step by Step Solution
- Step 1: Write the proportion equation
100.83 : 139.17 = 68.09 : x - Step 2: Convert to fraction form
100.83/139.17 = 68.09/x - Step 3: Cross multiply
100.83x = 139.17 × 68.09 - Step 4: Simplify right side
100.83x = 9,476.09 - Step 5: Solve for x
x = 9,476.09/100.83 - Step 6: Final answer
x = 93.98
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.