Finding the Fourth Proportional to 99,658.20, 149,487.30 and 77,107.80
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Solution
The fourth proportional to 99,658.20, 149,487.30 and 77,107.80 is: 115,661.70
Step by Step Solution
- Step 1: Write the proportion equation
99,658.20 : 149,487.30 = 77,107.80 : x - Step 2: Convert to fraction form
99,658.20/149,487.30 = 77,107.80/x - Step 3: Cross multiply
99,658.20x = 149,487.30 × 77,107.80 - Step 4: Simplify right side
99,658.20x = 11,526,636,830.94 - Step 5: Solve for x
x = 11,526,636,830.94/99,658.20 - Step 6: Final answer
x = 115,661.70
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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.