Finding the Fourth Proportional to 138,647.06, 191,332.93 and 74,984.85
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Solution
The fourth proportional to 138,647.06, 191,332.93 and 74,984.85 is: 103,479.09
Step by Step Solution
- Step 1: Write the proportion equation
138,647.06 : 191,332.93 = 74,984.85 : x - Step 2: Convert to fraction form
138,647.06/191,332.93 = 74,984.85/x - Step 3: Cross multiply
138,647.06x = 191,332.93 × 74,984.85 - Step 4: Simplify right side
138,647.06x = 14,347,071,649.19 - Step 5: Solve for x
x = 14,347,071,649.19/138,647.06 - Step 6: Final answer
x = 103,479.09
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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.