Finding the Fourth Proportional to 152.13, 209.89 and 89.99
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Solution
The fourth proportional to 152.13, 209.89 and 89.99 is: 124.15
Step by Step Solution
- Step 1: Write the proportion equation
152.13 : 209.89 = 89.99 : x - Step 2: Convert to fraction form
152.13/209.89 = 89.99/x - Step 3: Cross multiply
152.13x = 209.89 × 89.99 - Step 4: Simplify right side
152.13x = 18,886.73 - Step 5: Solve for x
x = 18,886.73/152.13 - Step 6: Final answer
x = 124.15
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.