Finding the Fourth Proportional to 78,230.12, 107,929.22 and 51,387.08
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Solution
The fourth proportional to 78,230.12, 107,929.22 and 51,387.08 is: 70,895.55
Step by Step Solution
- Step 1: Write the proportion equation
78,230.12 : 107,929.22 = 51,387.08 : x - Step 2: Convert to fraction form
78,230.12/107,929.22 = 51,387.08/x - Step 3: Cross multiply
78,230.12x = 107,929.22 × 51,387.08 - Step 4: Simplify right side
78,230.12x = 5,546,167,462.48 - Step 5: Solve for x
x = 5,546,167,462.48/78,230.12 - Step 6: Final answer
x = 70,895.55
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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.