Finding the Fourth Proportional to 103.76, 143.12 and 71.04
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Solution
The fourth proportional to 103.76, 143.12 and 71.04 is: 97.99
Step by Step Solution
- Step 1: Write the proportion equation
103.76 : 143.12 = 71.04 : x - Step 2: Convert to fraction form
103.76/143.12 = 71.04/x - Step 3: Cross multiply
103.76x = 143.12 × 71.04 - Step 4: Simplify right side
103.76x = 10,167.24 - Step 5: Solve for x
x = 10,167.24/103.76 - Step 6: Final answer
x = 97.99
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.