Finding the Fourth Proportional to 78,154.20, 107,852.58 and 42,344.28
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Solution
The fourth proportional to 78,154.20, 107,852.58 and 42,344.28 is: 58,434.99
Step by Step Solution
- Step 1: Write the proportion equation
78,154.20 : 107,852.58 = 42,344.28 : x - Step 2: Convert to fraction form
78,154.20/107,852.58 = 42,344.28/x - Step 3: Cross multiply
78,154.20x = 107,852.58 × 42,344.28 - Step 4: Simplify right side
78,154.20x = 4,566,939,846.24 - Step 5: Solve for x
x = 4,566,939,846.24/78,154.20 - Step 6: Final answer
x = 58,434.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.