Finding the Fourth Proportional to 145,899.75, 201,341.70 and 78,831.75
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Solution
The fourth proportional to 145,899.75, 201,341.70 and 78,831.75 is: 108,787.84
Step by Step Solution
- Step 1: Write the proportion equation
145,899.75 : 201,341.70 = 78,831.75 : x - Step 2: Convert to fraction form
145,899.75/201,341.70 = 78,831.75/x - Step 3: Cross multiply
145,899.75x = 201,341.70 × 78,831.75 - Step 4: Simplify right side
145,899.75x = 15,872,118,558.98 - Step 5: Solve for x
x = 15,872,118,558.98/145,899.75 - Step 6: Final answer
x = 108,787.84
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1.5x scale
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.