Finding the Fourth Proportional to 74,711.60, 112,128.60 and 74,128.40
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Solution
The fourth proportional to 74,711.60, 112,128.60 and 74,128.40 is: 111,253.32
Step by Step Solution
- Step 1: Write the proportion equation
74,711.60 : 112,128.60 = 74,128.40 : x - Step 2: Convert to fraction form
74,711.60/112,128.60 = 74,128.40/x - Step 3: Cross multiply
74,711.60x = 112,128.60 × 74,128.40 - Step 4: Simplify right side
74,711.60x = 8,311,913,712.24 - Step 5: Solve for x
x = 8,311,913,712.24/74,711.60 - Step 6: Final answer
x = 111,253.32
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.