Finding the Fourth Proportional to 100.80, 151.16 and 42.99
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Solution
The fourth proportional to 100.80, 151.16 and 42.99 is: 64.47
Step by Step Solution
- Step 1: Write the proportion equation
100.80 : 151.16 = 42.99 : x - Step 2: Convert to fraction form
100.80/151.16 = 42.99/x - Step 3: Cross multiply
100.80x = 151.16 × 42.99 - Step 4: Simplify right side
100.80x = 6,498.15 - Step 5: Solve for x
x = 6,498.15/100.80 - Step 6: Final answer
x = 64.47
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.