Finding the Fourth Proportional to 130.92, 180.68 and 79.18
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Solution
The fourth proportional to 130.92, 180.68 and 79.18 is: 109.27
Step by Step Solution
- Step 1: Write the proportion equation
130.92 : 180.68 = 79.18 : x - Step 2: Convert to fraction form
130.92/180.68 = 79.18/x - Step 3: Cross multiply
130.92x = 180.68 × 79.18 - Step 4: Simplify right side
130.92x = 14,306.24 - Step 5: Solve for x
x = 14,306.24/130.92 - Step 6: Final answer
x = 109.27
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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.