Finding the Fourth Proportional to 78,586,579.70, 107,663,998.35 and 75,641,176.70
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Solution
The fourth proportional to 78,586,579.70, 107,663,998.35 and 75,641,176.70 is: 103,628,781.84
Step by Step Solution
- Step 1: Write the proportion equation
78,586,579.70 : 107,663,998.35 = 75,641,176.70 : x - Step 2: Convert to fraction form
78,586,579.70/107,663,998.35 = 75,641,176.70/x - Step 3: Cross multiply
78,586,579.70x = 107,663,998.35 × 75,641,176.70 - Step 4: Simplify right side
78,586,579.70x = 8,143,831,523,420,858 - Step 5: Solve for x
x = 8,143,831,523,420,858/78,586,579.70 - Step 6: Final answer
x = 103,628,781.84
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.