Finding the Fourth Proportional to 100,829.14, 139,139.21 and 55,511.09
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Solution
The fourth proportional to 100,829.14, 139,139.21 and 55,511.09 is: 76,602.55
Step by Step Solution
- Step 1: Write the proportion equation
100,829.14 : 139,139.21 = 55,511.09 : x - Step 2: Convert to fraction form
100,829.14/139,139.21 = 55,511.09/x - Step 3: Cross multiply
100,829.14x = 139,139.21 × 55,511.09 - Step 4: Simplify right side
100,829.14x = 7,723,769,173.69 - Step 5: Solve for x
x = 7,723,769,173.69/100,829.14 - Step 6: Final answer
x = 76,602.55
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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.