Finding the Fourth Proportional to 128,200,558.62, 176,977,770.36 and 85,886,977.05
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Solution
The fourth proportional to 128,200,558.62, 176,977,770.36 and 85,886,977.05 is: 118,564,894.45
Step by Step Solution
- Step 1: Write the proportion equation
128,200,558.62 : 176,977,770.36 = 85,886,977.05 : x - Step 2: Convert to fraction form
128,200,558.62/176,977,770.36 = 85,886,977.05/x - Step 3: Cross multiply
128,200,558.62x = 176,977,770.36 × 85,886,977.05 - Step 4: Simplify right side
128,200,558.62x = 15,200,085,701,269,490 - Step 5: Solve for x
x = 15,200,085,701,269,490/128,200,558.62 - Step 6: Final answer
x = 118,564,894.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.