Finding the Fourth Proportional to 151.47, 209.05 and 86.00
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Solution
The fourth proportional to 151.47, 209.05 and 86.00 is: 118.68
Step by Step Solution
- Step 1: Write the proportion equation
151.47 : 209.05 = 86.00 : x - Step 2: Convert to fraction form
151.47/209.05 = 86.00/x - Step 3: Cross multiply
151.47x = 209.05 × 86.00 - Step 4: Simplify right side
151.47x = 17,977.04 - Step 5: Solve for x
x = 17,977.04/151.47 - Step 6: Final answer
x = 118.68
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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.