Finding the Fourth Proportional to 121,124,536,639.30, 181,686,804,958.95 and 81,452,678,565.70
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Solution
The fourth proportional to 121,124,536,639.30, 181,686,804,958.95 and 81,452,678,565.70 is: 122,179,017,848.55
Step by Step Solution
- Step 1: Write the proportion equation
121,124,536,639.30 : 181,686,804,958.95 = 81,452,678,565.70 : x - Step 2: Convert to fraction form
121,124,536,639.30/181,686,804,958.95 = 81,452,678,565.70/x - Step 3: Cross multiply
121,124,536,639.30x = 181,686,804,958.95 × 81,452,678,565.70 - Step 4: Simplify right side
121,124,536,639.30x = 14,798,876,923,950,383,759,360 - Step 5: Solve for x
x = 14,798,876,923,950,383,759,360/121,124,536,639.30 - Step 6: Final answer
x = 122,179,017,848.55
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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.