Finding the Fourth Proportional to 130,139.75, 194,986.56 and 87,365.09
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Solution
The fourth proportional to 130,139.75, 194,986.56 and 87,365.09 is: 130,897.89
Step by Step Solution
- Step 1: Write the proportion equation
130,139.75 : 194,986.56 = 87,365.09 : x - Step 2: Convert to fraction form
130,139.75/194,986.56 = 87,365.09/x - Step 3: Cross multiply
130,139.75x = 194,986.56 × 87,365.09 - Step 4: Simplify right side
130,139.75x = 17,035,018,363.19 - Step 5: Solve for x
x = 17,035,018,363.19/130,139.75 - Step 6: Final answer
x = 130,897.89
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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.