Finding the Fourth Proportional to 128,956.84, 177,914.80 and 84,270.76
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Solution
The fourth proportional to 128,956.84, 177,914.80 and 84,270.76 is: 116,263.82
Step by Step Solution
- Step 1: Write the proportion equation
128,956.84 : 177,914.80 = 84,270.76 : x - Step 2: Convert to fraction form
128,956.84/177,914.80 = 84,270.76/x - Step 3: Cross multiply
128,956.84x = 177,914.80 × 84,270.76 - Step 4: Simplify right side
128,956.84x = 14,993,015,411.25 - Step 5: Solve for x
x = 14,993,015,411.25/128,956.84 - Step 6: Final answer
x = 116,263.82
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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.