Finding the Fourth Proportional to 78,135.16, 117,202.74 and 18,970.92
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Solution
The fourth proportional to 78,135.16, 117,202.74 and 18,970.92 is: 28,456.38
Step by Step Solution
- Step 1: Write the proportion equation
78,135.16 : 117,202.74 = 18,970.92 : x - Step 2: Convert to fraction form
78,135.16/117,202.74 = 18,970.92/x - Step 3: Cross multiply
78,135.16x = 117,202.74 × 18,970.92 - Step 4: Simplify right side
78,135.16x = 2,223,443,804.32 - Step 5: Solve for x
x = 2,223,443,804.32/78,135.16 - Step 6: Final answer
x = 28,456.38
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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.