Finding the Fourth Proportional to 103,708.80, 155,332.80 and 85,276.80
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Solution
The fourth proportional to 103,708.80, 155,332.80 and 85,276.80 is: 127,725.75
Step by Step Solution
- Step 1: Write the proportion equation
103,708.80 : 155,332.80 = 85,276.80 : x - Step 2: Convert to fraction form
103,708.80/155,332.80 = 85,276.80/x - Step 3: Cross multiply
103,708.80x = 155,332.80 × 85,276.80 - Step 4: Simplify right side
103,708.80x = 13,246,284,119.04 - Step 5: Solve for x
x = 13,246,284,119.04/103,708.80 - Step 6: Final answer
x = 127,725.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.