Finding the Fourth Proportional to 81,649,902.10, 122,474,853.15 and 78,878,535.70
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Solution
The fourth proportional to 81,649,902.10, 122,474,853.15 and 78,878,535.70 is: 118,317,803.55
Step by Step Solution
- Step 1: Write the proportion equation
81,649,902.10 : 122,474,853.15 = 78,878,535.70 : x - Step 2: Convert to fraction form
81,649,902.10/122,474,853.15 = 78,878,535.70/x - Step 3: Cross multiply
81,649,902.10x = 122,474,853.15 × 78,878,535.70 - Step 4: Simplify right side
81,649,902.10x = 9,660,637,076,544,534 - Step 5: Solve for x
x = 9,660,637,076,544,534/81,649,902.10 - Step 6: Final answer
x = 118,317,803.55
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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.