Finding the Fourth Proportional to 171,921.96, 257,938.99 and 86,488.74
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Solution
The fourth proportional to 171,921.96, 257,938.99 and 86,488.74 is: 129,761.31
Step by Step Solution
- Step 1: Write the proportion equation
171,921.96 : 257,938.99 = 86,488.74 : x - Step 2: Convert to fraction form
171,921.96/257,938.99 = 86,488.74/x - Step 3: Cross multiply
171,921.96x = 257,938.99 × 86,488.74 - Step 4: Simplify right side
171,921.96x = 22,308,818,025.75 - Step 5: Solve for x
x = 22,308,818,025.75/171,921.96 - Step 6: Final answer
x = 129,761.31
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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.