Finding the Fourth Proportional to 128,405,030,107.34, 177,199,355,603.77 and 71,312,340,603.85
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Solution
The fourth proportional to 128,405,030,107.34, 177,199,355,603.77 and 71,312,340,603.85 is: 98,411,259,987.52
Step by Step Solution
- Step 1: Write the proportion equation
128,405,030,107.34 : 177,199,355,603.77 = 71,312,340,603.85 : x - Step 2: Convert to fraction form
128,405,030,107.34/177,199,355,603.77 = 71,312,340,603.85/x - Step 3: Cross multiply
128,405,030,107.34x = 177,199,355,603.77 × 71,312,340,603.85 - Step 4: Simplify right side
128,405,030,107.34x = 12,636,500,801,598,783,488,000 - Step 5: Solve for x
x = 12,636,500,801,598,783,488,000/128,405,030,107.34 - Step 6: Final answer
x = 98,411,259,987.52
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1.5x scale
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.