Finding the Fourth Proportional to 156,930.12, 216,564.98 and 85,310.28
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Solution
The fourth proportional to 156,930.12, 216,564.98 and 85,310.28 is: 117,728.95
Step by Step Solution
- Step 1: Write the proportion equation
156,930.12 : 216,564.98 = 85,310.28 : x - Step 2: Convert to fraction form
156,930.12/216,564.98 = 85,310.28/x - Step 3: Cross multiply
156,930.12x = 216,564.98 × 85,310.28 - Step 4: Simplify right side
156,930.12x = 18,475,218,655.44 - Step 5: Solve for x
x = 18,475,218,655.44/156,930.12 - Step 6: Final answer
x = 117,728.95
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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.