Finding the Fourth Proportional to 71,655.84, 107,505.36 and 28,939.32
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Solution
The fourth proportional to 71,655.84, 107,505.36 and 28,939.32 is: 43,417.70
Step by Step Solution
- Step 1: Write the proportion equation
71,655.84 : 107,505.36 = 28,939.32 : x - Step 2: Convert to fraction form
71,655.84/107,505.36 = 28,939.32/x - Step 3: Cross multiply
71,655.84x = 107,505.36 × 28,939.32 - Step 4: Simplify right side
71,655.84x = 3,111,132,014.76 - Step 5: Solve for x
x = 3,111,132,014.76/71,655.84 - Step 6: Final answer
x = 43,417.70
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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.