Finding the Fourth Proportional to 130,729.47, 180,403.16 and 74,139.63
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Solution
The fourth proportional to 130,729.47, 180,403.16 and 74,139.63 is: 102,310.70
Step by Step Solution
- Step 1: Write the proportion equation
130,729.47 : 180,403.16 = 74,139.63 : x - Step 2: Convert to fraction form
130,729.47/180,403.16 = 74,139.63/x - Step 3: Cross multiply
130,729.47x = 180,403.16 × 74,139.63 - Step 4: Simplify right side
130,729.47x = 13,375,022,631.22 - Step 5: Solve for x
x = 13,375,022,631.22/130,729.47 - Step 6: Final answer
x = 102,310.70
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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.