Finding the Fourth Proportional to 106,615.75, 147,142.70 and 61,903.75
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Solution
The fourth proportional to 106,615.75, 147,142.70 and 61,903.75 is: 85,434.70
Step by Step Solution
- Step 1: Write the proportion equation
106,615.75 : 147,142.70 = 61,903.75 : x - Step 2: Convert to fraction form
106,615.75/147,142.70 = 61,903.75/x - Step 3: Cross multiply
106,615.75x = 147,142.70 × 61,903.75 - Step 4: Simplify right side
106,615.75x = 9,108,684,605.61 - Step 5: Solve for x
x = 9,108,684,605.61/106,615.75 - Step 6: Final answer
x = 85,434.70
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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.