Finding the Fourth Proportional to 128,725,980.80, 193,088,971.20 and 74,306,422.40
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Solution
The fourth proportional to 128,725,980.80, 193,088,971.20 and 74,306,422.40 is: 111,459,633.60
Step by Step Solution
- Step 1: Write the proportion equation
128,725,980.80 : 193,088,971.20 = 74,306,422.40 : x - Step 2: Convert to fraction form
128,725,980.80/193,088,971.20 = 74,306,422.40/x - Step 3: Cross multiply
128,725,980.80x = 193,088,971.20 × 74,306,422.40 - Step 4: Simplify right side
128,725,980.80x = 14,347,750,654,768,636 - Step 5: Solve for x
x = 14,347,750,654,768,636/128,725,980.80 - Step 6: Final answer
x = 111,459,633.60
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1.5x scale
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.