Finding the Fourth Proportional to 130,890.20, 180,623.70 and 79,988.13
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Solution
The fourth proportional to 130,890.20, 180,623.70 and 79,988.13 is: 110,380.70
Step by Step Solution
- Step 1: Write the proportion equation
130,890.20 : 180,623.70 = 79,988.13 : x - Step 2: Convert to fraction form
130,890.20/180,623.70 = 79,988.13/x - Step 3: Cross multiply
130,890.20x = 180,623.70 × 79,988.13 - Step 4: Simplify right side
130,890.20x = 14,447,751,996.68 - Step 5: Solve for x
x = 14,447,751,996.68/130,890.20 - Step 6: Final answer
x = 110,380.70
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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.