Finding the Fourth Proportional to 87.06, 130.68 and 71.22
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Solution
The fourth proportional to 87.06, 130.68 and 71.22 is: 106.90
Step by Step Solution
- Step 1: Write the proportion equation
87.06 : 130.68 = 71.22 : x - Step 2: Convert to fraction form
87.06/130.68 = 71.22/x - Step 3: Cross multiply
87.06x = 130.68 × 71.22 - Step 4: Simplify right side
87.06x = 9,307.03 - Step 5: Solve for x
x = 9,307.03/87.06 - Step 6: Final answer
x = 106.90
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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.