Finding the Fourth Proportional to 128,251.31, 176,981.32 and 70,887.70
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Solution
The fourth proportional to 128,251.31, 176,981.32 and 70,887.70 is: 97,821.99
Step by Step Solution
- Step 1: Write the proportion equation
128,251.31 : 176,981.32 = 70,887.70 : x - Step 2: Convert to fraction form
128,251.31/176,981.32 = 70,887.70/x - Step 3: Cross multiply
128,251.31x = 176,981.32 × 70,887.70 - Step 4: Simplify right side
128,251.31x = 12,545,798,717.76 - Step 5: Solve for x
x = 12,545,798,717.76/128,251.31 - Step 6: Final answer
x = 97,821.99
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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.