Finding the Fourth Proportional to 78,889,236.41, 118,333,854.90 and 21,381,507.65
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Solution
The fourth proportional to 78,889,236.41, 118,333,854.90 and 21,381,507.65 is: 32,072,261.55
Step by Step Solution
- Step 1: Write the proportion equation
78,889,236.41 : 118,333,854.90 = 21,381,507.65 : x - Step 2: Convert to fraction form
78,889,236.41/118,333,854.90 = 21,381,507.65/x - Step 3: Cross multiply
78,889,236.41x = 118,333,854.90 × 21,381,507.65 - Step 4: Simplify right side
78,889,236.41x = 2,530,156,223,798,340 - Step 5: Solve for x
x = 2,530,156,223,798,340/78,889,236.41 - Step 6: Final answer
x = 32,072,261.55
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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.