Finding the Fourth Proportional to 100,915.75, 139,263.74 and 56,203.75
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Solution
The fourth proportional to 100,915.75, 139,263.74 and 56,203.75 is: 77,561.18
Step by Step Solution
- Step 1: Write the proportion equation
100,915.75 : 139,263.74 = 56,203.75 : x - Step 2: Convert to fraction form
100,915.75/139,263.74 = 56,203.75/x - Step 3: Cross multiply
100,915.75x = 139,263.74 × 56,203.75 - Step 4: Simplify right side
100,915.75x = 7,827,144,427.03 - Step 5: Solve for x
x = 7,827,144,427.03/100,915.75 - Step 6: Final answer
x = 77,561.18
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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.