Finding the Fourth Proportional to 8,789,164,117.68, 12,130,086,291.71 and 5,220,885,121.57
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Solution
The fourth proportional to 8,789,164,117.68, 12,130,086,291.71 and 5,220,885,121.57 is: 7,205,439,128.88
Step by Step Solution
- Step 1: Write the proportion equation
8,789,164,117.68 : 12,130,086,291.71 = 5,220,885,121.57 : x - Step 2: Convert to fraction form
8,789,164,117.68/12,130,086,291.71 = 5,220,885,121.57/x - Step 3: Cross multiply
8,789,164,117.68x = 12,130,086,291.71 × 5,220,885,121.57 - Step 4: Simplify right side
8,789,164,117.68x = 63,329,787,043,708,190,720 - Step 5: Solve for x
x = 63,329,787,043,708,190,720/8,789,164,117.68 - Step 6: Final answer
x = 7,205,439,128.88
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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.