Finding the Fourth Proportional to 121,155.20, 181,927.20 and 81,886.40
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Solution
The fourth proportional to 121,155.20, 181,927.20 and 81,886.40 is: 122,960.99
Step by Step Solution
- Step 1: Write the proportion equation
121,155.20 : 181,927.20 = 81,886.40 : x - Step 2: Convert to fraction form
121,155.20/181,927.20 = 81,886.40/x - Step 3: Cross multiply
121,155.20x = 181,927.20 × 81,886.40 - Step 4: Simplify right side
121,155.20x = 14,897,363,470.08 - Step 5: Solve for x
x = 14,897,363,470.08/121,155.20 - Step 6: Final answer
x = 122,960.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.