Finding the Fourth Proportional to 71,697.36, 107,545.80 and 18,389.28
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Solution
The fourth proportional to 71,697.36, 107,545.80 and 18,389.28 is: 27,583.86
Step by Step Solution
- Step 1: Write the proportion equation
71,697.36 : 107,545.80 = 18,389.28 : x - Step 2: Convert to fraction form
71,697.36/107,545.80 = 18,389.28/x - Step 3: Cross multiply
71,697.36x = 107,545.80 × 18,389.28 - Step 4: Simplify right side
71,697.36x = 1,977,689,829.02 - Step 5: Solve for x
x = 1,977,689,829.02/71,697.36 - Step 6: Final answer
x = 27,583.86
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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.