Finding the Fourth Proportional to 213,499.18, 319,989.80 and 156,813.68
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Solution
The fourth proportional to 213,499.18, 319,989.80 and 156,813.68 is: 235,030.31
Step by Step Solution
- Step 1: Write the proportion equation
213,499.18 : 319,989.80 = 156,813.68 : x - Step 2: Convert to fraction form
213,499.18/319,989.80 = 156,813.68/x - Step 3: Cross multiply
213,499.18x = 319,989.80 × 156,813.68 - Step 4: Simplify right side
213,499.18x = 50,178,778,100.46 - Step 5: Solve for x
x = 50,178,778,100.46/213,499.18 - Step 6: Final answer
x = 235,030.31
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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.