Finding the Fourth Proportional to 139,934.79, 193,108.05 and 76,272.84
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Solution
The fourth proportional to 139,934.79, 193,108.05 and 76,272.84 is: 105,255.45
Step by Step Solution
- Step 1: Write the proportion equation
139,934.79 : 193,108.05 = 76,272.84 : x - Step 2: Convert to fraction form
139,934.79/193,108.05 = 76,272.84/x - Step 3: Cross multiply
139,934.79x = 193,108.05 × 76,272.84 - Step 4: Simplify right side
139,934.79x = 14,728,899,400.36 - Step 5: Solve for x
x = 14,728,899,400.36/139,934.79 - Step 6: Final answer
x = 105,255.45
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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.