Finding the Fourth Proportional to 128,070.99, 176,748.08 and 74,372.85
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Solution
The fourth proportional to 128,070.99, 176,748.08 and 74,372.85 is: 102,640.40
Step by Step Solution
- Step 1: Write the proportion equation
128,070.99 : 176,748.08 = 74,372.85 : x - Step 2: Convert to fraction form
128,070.99/176,748.08 = 74,372.85/x - Step 3: Cross multiply
128,070.99x = 176,748.08 × 74,372.85 - Step 4: Simplify right side
128,070.99x = 13,145,258,069.76 - Step 5: Solve for x
x = 13,145,258,069.76/128,070.99 - Step 6: Final answer
x = 102,640.40
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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.