Finding the Fourth Proportional to 70,578.24, 105,864.84 and 17,987.28
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Solution
The fourth proportional to 70,578.24, 105,864.84 and 17,987.28 is: 26,980.28
Step by Step Solution
- Step 1: Write the proportion equation
70,578.24 : 105,864.84 = 17,987.28 : x - Step 2: Convert to fraction form
70,578.24/105,864.84 = 17,987.28/x - Step 3: Cross multiply
70,578.24x = 105,864.84 × 17,987.28 - Step 4: Simplify right side
70,578.24x = 1,904,220,519.24 - Step 5: Solve for x
x = 1,904,220,519.24/70,578.24 - Step 6: Final answer
x = 26,980.28
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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.