Finding the Fourth Proportional to 153,862.63, 212,334.80 and 85,878.19
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Solution
The fourth proportional to 153,862.63, 212,334.80 and 85,878.19 is: 118,514.35
Step by Step Solution
- Step 1: Write the proportion equation
153,862.63 : 212,334.80 = 85,878.19 : x - Step 2: Convert to fraction form
153,862.63/212,334.80 = 85,878.19/x - Step 3: Cross multiply
153,862.63x = 212,334.80 × 85,878.19 - Step 4: Simplify right side
153,862.63x = 18,234,929,427.30 - Step 5: Solve for x
x = 18,234,929,427.30/153,862.63 - Step 6: Final answer
x = 118,514.35
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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.