Finding the Fourth Proportional to 139.36, 209.07 and 48.05
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Solution
The fourth proportional to 139.36, 209.07 and 48.05 is: 72.09
Step by Step Solution
- Step 1: Write the proportion equation
139.36 : 209.07 = 48.05 : x - Step 2: Convert to fraction form
139.36/209.07 = 48.05/x - Step 3: Cross multiply
139.36x = 209.07 × 48.05 - Step 4: Simplify right side
139.36x = 10,046.59 - Step 5: Solve for x
x = 10,046.59/139.36 - Step 6: Final answer
x = 72.09
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.