Finding the Fourth Proportional to 139.32, 208.96 and 48
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Solution
The fourth proportional to 139.32, 208.96 and 48 is: 71.99
Step by Step Solution
- Step 1: Write the proportion equation
139.32 : 208.96 = 48 : x - Step 2: Convert to fraction form
139.32/208.96 = 48/x - Step 3: Cross multiply
139.32x = 208.96 × 48 - Step 4: Simplify right side
139.32x = 10,030.08 - Step 5: Solve for x
x = 10,030.08/139.32 - Step 6: Final answer
x = 71.99
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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.