Finding the Fourth Proportional to 130,979.26, 180,672.61 and 79,968.70
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Solution
The fourth proportional to 130,979.26, 180,672.61 and 79,968.70 is: 110,308.71
Step by Step Solution
- Step 1: Write the proportion equation
130,979.26 : 180,672.61 = 79,968.70 : x - Step 2: Convert to fraction form
130,979.26/180,672.61 = 79,968.70/x - Step 3: Cross multiply
130,979.26x = 180,672.61 × 79,968.70 - Step 4: Simplify right side
130,979.26x = 14,448,152,644.02 - Step 5: Solve for x
x = 14,448,152,644.02/130,979.26 - Step 6: Final answer
x = 110,308.71
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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.