Finding the Fourth Proportional to 122,087.20, 183,130.80 and 77,909.80
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Solution
The fourth proportional to 122,087.20, 183,130.80 and 77,909.80 is: 116,864.70
Step by Step Solution
- Step 1: Write the proportion equation
122,087.20 : 183,130.80 = 77,909.80 : x - Step 2: Convert to fraction form
122,087.20/183,130.80 = 77,909.80/x - Step 3: Cross multiply
122,087.20x = 183,130.80 × 77,909.80 - Step 4: Simplify right side
122,087.20x = 14,267,684,001.84 - Step 5: Solve for x
x = 14,267,684,001.84/122,087.20 - Step 6: Final answer
x = 116,864.70
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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.