Finding the Fourth Proportional to 139.18, 208.82 and 58.00
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Solution
The fourth proportional to 139.18, 208.82 and 58.00 is: 87.02
Step by Step Solution
- Step 1: Write the proportion equation
139.18 : 208.82 = 58.00 : x - Step 2: Convert to fraction form
139.18/208.82 = 58.00/x - Step 3: Cross multiply
139.18x = 208.82 × 58.00 - Step 4: Simplify right side
139.18x = 12,110.75 - Step 5: Solve for x
x = 12,110.75/139.18 - Step 6: Final answer
x = 87.02
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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.