Finding the Fourth Proportional to 128,601.62, 192,831.95 and 39,830.48
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Solution
The fourth proportional to 128,601.62, 192,831.95 and 39,830.48 is: 59,723.89
Step by Step Solution
- Step 1: Write the proportion equation
128,601.62 : 192,831.95 = 39,830.48 : x - Step 2: Convert to fraction form
128,601.62/192,831.95 = 39,830.48/x - Step 3: Cross multiply
128,601.62x = 192,831.95 × 39,830.48 - Step 4: Simplify right side
128,601.62x = 7,680,588,263.25 - Step 5: Solve for x
x = 7,680,588,263.25/128,601.62 - Step 6: Final answer
x = 59,723.89
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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.