Finding the Fourth Proportional to 128,009.24, 176,652.84 and 71,420.60
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Solution
The fourth proportional to 128,009.24, 176,652.84 and 71,420.60 is: 98,560.48
Step by Step Solution
- Step 1: Write the proportion equation
128,009.24 : 176,652.84 = 71,420.60 : x - Step 2: Convert to fraction form
128,009.24/176,652.84 = 71,420.60/x - Step 3: Cross multiply
128,009.24x = 176,652.84 × 71,420.60 - Step 4: Simplify right side
128,009.24x = 12,616,651,824.50 - Step 5: Solve for x
x = 12,616,651,824.50/128,009.24 - Step 6: Final answer
x = 98,560.48
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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.