Finding the Fourth Proportional to 145,156,971.60, 217,593,739.80 and 129,851,470.80
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Solution
The fourth proportional to 145,156,971.60, 217,593,739.80 and 129,851,470.80 is: 194,650,431.45
Step by Step Solution
- Step 1: Write the proportion equation
145,156,971.60 : 217,593,739.80 = 129,851,470.80 : x - Step 2: Convert to fraction form
145,156,971.60/217,593,739.80 = 129,851,470.80/x - Step 3: Cross multiply
145,156,971.60x = 217,593,739.80 × 129,851,470.80 - Step 4: Simplify right side
145,156,971.60x = 28,254,867,149,902,500 - Step 5: Solve for x
x = 28,254,867,149,902,500/145,156,971.60 - Step 6: Final answer
x = 194,650,431.45
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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.