Finding the Fourth Proportional to 78,312,279.20, 117,468,418.80 and 58,156,887.20
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Solution
The fourth proportional to 78,312,279.20, 117,468,418.80 and 58,156,887.20 is: 87,235,330.80
Step by Step Solution
- Step 1: Write the proportion equation
78,312,279.20 : 117,468,418.80 = 58,156,887.20 : x - Step 2: Convert to fraction form
78,312,279.20/117,468,418.80 = 58,156,887.20/x - Step 3: Cross multiply
78,312,279.20x = 117,468,418.80 × 58,156,887.20 - Step 4: Simplify right side
78,312,279.20x = 6,831,597,581,713,960 - Step 5: Solve for x
x = 6,831,597,581,713,960/78,312,279.20 - Step 6: Final answer
x = 87,235,330.80
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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.