Finding the Fourth Proportional to 91,069.20, 136,603.80 and 55,639.80
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Solution
The fourth proportional to 91,069.20, 136,603.80 and 55,639.80 is: 83,459.70
Step by Step Solution
- Step 1: Write the proportion equation
91,069.20 : 136,603.80 = 55,639.80 : x - Step 2: Convert to fraction form
91,069.20/136,603.80 = 55,639.80/x - Step 3: Cross multiply
91,069.20x = 136,603.80 × 55,639.80 - Step 4: Simplify right side
91,069.20x = 7,600,608,111.24 - Step 5: Solve for x
x = 7,600,608,111.24/91,069.20 - Step 6: Final answer
x = 83,459.70
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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.