Finding the Fourth Proportional to 139,312.44, 192,253.46 and 78,881.49
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Solution
The fourth proportional to 139,312.44, 192,253.46 and 78,881.49 is: 108,857.75
Step by Step Solution
- Step 1: Write the proportion equation
139,312.44 : 192,253.46 = 78,881.49 : x - Step 2: Convert to fraction form
139,312.44/192,253.46 = 78,881.49/x - Step 3: Cross multiply
139,312.44x = 192,253.46 × 78,881.49 - Step 4: Simplify right side
139,312.44x = 15,165,238,988.05 - Step 5: Solve for x
x = 15,165,238,988.05/139,312.44 - Step 6: Final answer
x = 108,857.75
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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.