Finding the Fourth Proportional to 136,943.68, 188,981.76 and 76,519.84
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Solution
The fourth proportional to 136,943.68, 188,981.76 and 76,519.84 is: 105,597.09
Step by Step Solution
- Step 1: Write the proportion equation
136,943.68 : 188,981.76 = 76,519.84 : x - Step 2: Convert to fraction form
136,943.68/188,981.76 = 76,519.84/x - Step 3: Cross multiply
136,943.68x = 188,981.76 × 76,519.84 - Step 4: Simplify right side
136,943.68x = 14,460,854,038.12 - Step 5: Solve for x
x = 14,460,854,038.12/136,943.68 - Step 6: Final answer
x = 105,597.09
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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.