Finding the Fourth Proportional to 76,880.08, 115,316.01 and 20,719.28
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Solution
The fourth proportional to 76,880.08, 115,316.01 and 20,719.28 is: 31,077.82
Step by Step Solution
- Step 1: Write the proportion equation
76,880.08 : 115,316.01 = 20,719.28 : x - Step 2: Convert to fraction form
76,880.08/115,316.01 = 20,719.28/x - Step 3: Cross multiply
76,880.08x = 115,316.01 × 20,719.28 - Step 4: Simplify right side
76,880.08x = 2,389,264,987.96 - Step 5: Solve for x
x = 2,389,264,987.96/76,880.08 - Step 6: Final answer
x = 31,077.82
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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.