Finding the Fourth Proportional to 151,315.20, 208,806.98 and 86,781.09
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Solution
The fourth proportional to 151,315.20, 208,806.98 and 86,781.09 is: 119,753.32
Step by Step Solution
- Step 1: Write the proportion equation
151,315.20 : 208,806.98 = 86,781.09 : x - Step 2: Convert to fraction form
151,315.20/208,806.98 = 86,781.09/x - Step 3: Cross multiply
151,315.20x = 208,806.98 × 86,781.09 - Step 4: Simplify right side
151,315.20x = 18,120,496,890.10 - Step 5: Solve for x
x = 18,120,496,890.10/151,315.20 - Step 6: Final answer
x = 119,753.32
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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.