Finding the Fourth Proportional to 125,220.80, 187,831.20 and 72,765.20
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Solution
The fourth proportional to 125,220.80, 187,831.20 and 72,765.20 is: 109,147.80
Step by Step Solution
- Step 1: Write the proportion equation
125,220.80 : 187,831.20 = 72,765.20 : x - Step 2: Convert to fraction form
125,220.80/187,831.20 = 72,765.20/x - Step 3: Cross multiply
125,220.80x = 187,831.20 × 72,765.20 - Step 4: Simplify right side
125,220.80x = 13,667,574,834.24 - Step 5: Solve for x
x = 13,667,574,834.24/125,220.80 - Step 6: Final answer
x = 109,147.80
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1.5x scale
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.