Finding the Fourth Proportional to 139,861.68, 209,865.36 and 55,603.84
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Solution
The fourth proportional to 139,861.68, 209,865.36 and 55,603.84 is: 83,434.72
Step by Step Solution
- Step 1: Write the proportion equation
139,861.68 : 209,865.36 = 55,603.84 : x - Step 2: Convert to fraction form
139,861.68/209,865.36 = 55,603.84/x - Step 3: Cross multiply
139,861.68x = 209,865.36 × 55,603.84 - Step 4: Simplify right side
139,861.68x = 11,669,319,898.98 - Step 5: Solve for x
x = 11,669,319,898.98/139,861.68 - Step 6: Final answer
x = 83,434.72
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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.