Finding the Fourth Proportional to 81,146.76, 121,707.84 and 28,543.92
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Solution
The fourth proportional to 81,146.76, 121,707.84 and 28,543.92 is: 42,811.55
Step by Step Solution
- Step 1: Write the proportion equation
81,146.76 : 121,707.84 = 28,543.92 : x - Step 2: Convert to fraction form
81,146.76/121,707.84 = 28,543.92/x - Step 3: Cross multiply
81,146.76x = 121,707.84 × 28,543.92 - Step 4: Simplify right side
81,146.76x = 3,474,018,848.33 - Step 5: Solve for x
x = 3,474,018,848.33/81,146.76 - Step 6: Final answer
x = 42,811.55
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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.