Finding the Fourth Proportional to 121,113.12, 167,128.95 and 70,122.21
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Solution
The fourth proportional to 121,113.12, 167,128.95 and 70,122.21 is: 96,764.50
Step by Step Solution
- Step 1: Write the proportion equation
121,113.12 : 167,128.95 = 70,122.21 : x - Step 2: Convert to fraction form
121,113.12/167,128.95 = 70,122.21/x - Step 3: Cross multiply
121,113.12x = 167,128.95 × 70,122.21 - Step 4: Simplify right side
121,113.12x = 11,719,450,965.20 - Step 5: Solve for x
x = 11,719,450,965.20/121,113.12 - Step 6: Final answer
x = 96,764.50
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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.