Finding the Fourth Proportional to 79,730,821.20, 119,596,231.80 and 74,422,405.20
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Solution
The fourth proportional to 79,730,821.20, 119,596,231.80 and 74,422,405.20 is: 111,633,607.80
Step by Step Solution
- Step 1: Write the proportion equation
79,730,821.20 : 119,596,231.80 = 74,422,405.20 : x - Step 2: Convert to fraction form
79,730,821.20/119,596,231.80 = 74,422,405.20/x - Step 3: Cross multiply
79,730,821.20x = 119,596,231.80 × 74,422,405.20 - Step 4: Simplify right side
79,730,821.20x = 8,900,639,223,412,725 - Step 5: Solve for x
x = 8,900,639,223,412,725/79,730,821.20 - Step 6: Final answer
x = 111,633,607.80
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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.