Finding the Fourth Proportional to 139.98, 209.88 and 48.70
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Solution
The fourth proportional to 139.98, 209.88 and 48.70 is: 73.02
Step by Step Solution
- Step 1: Write the proportion equation
139.98 : 209.88 = 48.70 : x - Step 2: Convert to fraction form
139.98/209.88 = 48.70/x - Step 3: Cross multiply
139.98x = 209.88 × 48.70 - Step 4: Simplify right side
139.98x = 10,221.16 - Step 5: Solve for x
x = 10,221.16/139.98 - Step 6: Final answer
x = 73.02
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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.