Finding the Fourth Proportional to 76,278.24, 105,261.12 and 42,742.08
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Solution
The fourth proportional to 76,278.24, 105,261.12 and 42,742.08 is: 58,982.47
Step by Step Solution
- Step 1: Write the proportion equation
76,278.24 : 105,261.12 = 42,742.08 : x - Step 2: Convert to fraction form
76,278.24/105,261.12 = 42,742.08/x - Step 3: Cross multiply
76,278.24x = 105,261.12 × 42,742.08 - Step 4: Simplify right side
76,278.24x = 4,499,079,211.93 - Step 5: Solve for x
x = 4,499,079,211.93/76,278.24 - Step 6: Final answer
x = 58,982.47
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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.