Finding the Fourth Proportional to 145,156,979.60, 217,593,751.80 and 129,851,478.80
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Solution
The fourth proportional to 145,156,979.60, 217,593,751.80 and 129,851,478.80 is: 194,650,443.45
Step by Step Solution
- Step 1: Write the proportion equation
145,156,979.60 : 217,593,751.80 = 129,851,478.80 : x - Step 2: Convert to fraction form
145,156,979.60/217,593,751.80 = 129,851,478.80/x - Step 3: Cross multiply
145,156,979.60x = 217,593,751.80 × 129,851,478.80 - Step 4: Simplify right side
145,156,979.60x = 28,254,870,448,870,164 - Step 5: Solve for x
x = 28,254,870,448,870,164/145,156,979.60 - Step 6: Final answer
x = 194,650,443.45
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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.