Finding the Fourth Proportional to 128,405,030,108.84, 177,199,355,605.85 and 71,312,340,605.35
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Solution
The fourth proportional to 128,405,030,108.84, 177,199,355,605.85 and 71,312,340,605.35 is: 98,411,259,989.60
Step by Step Solution
- Step 1: Write the proportion equation
128,405,030,108.84 : 177,199,355,605.85 = 71,312,340,605.35 : x - Step 2: Convert to fraction form
128,405,030,108.84/177,199,355,605.85 = 71,312,340,605.35/x - Step 3: Cross multiply
128,405,030,108.84x = 177,199,355,605.85 × 71,312,340,605.35 - Step 4: Simplify right side
128,405,030,108.84x = 12,636,500,802,012,912,287,744 - Step 5: Solve for x
x = 12,636,500,802,012,912,287,744/128,405,030,108.84 - Step 6: Final answer
x = 98,411,259,989.60
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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.