Finding the Fourth Proportional to 88.99, 122.80 and 79.20
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Solution
The fourth proportional to 88.99, 122.80 and 79.20 is: 109.29
Step by Step Solution
- Step 1: Write the proportion equation
88.99 : 122.80 = 79.20 : x - Step 2: Convert to fraction form
88.99/122.80 = 79.20/x - Step 3: Cross multiply
88.99x = 122.80 × 79.20 - Step 4: Simplify right side
88.99x = 9,725.36 - Step 5: Solve for x
x = 9,725.36/88.99 - Step 6: Final answer
x = 109.29
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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.