Finding the Fourth Proportional to 139.02, 208.52 and 61.99
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Solution
The fourth proportional to 139.02, 208.52 and 61.99 is: 92.98
Step by Step Solution
- Step 1: Write the proportion equation
139.02 : 208.52 = 61.99 : x - Step 2: Convert to fraction form
139.02/208.52 = 61.99/x - Step 3: Cross multiply
139.02x = 208.52 × 61.99 - Step 4: Simplify right side
139.02x = 12,926.15 - Step 5: Solve for x
x = 12,926.15/139.02 - Step 6: Final answer
x = 92.98
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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.