Finding the Fourth Proportional to 9,320,931,169.79, 12,865,950,385.04 and 7,419,181,064.99
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Solution
The fourth proportional to 9,320,931,169.79, 12,865,950,385.04 and 7,419,181,064.99 is: 10,240,909,812.66
Step by Step Solution
- Step 1: Write the proportion equation
9,320,931,169.79 : 12,865,950,385.04 = 7,419,181,064.99 : x - Step 2: Convert to fraction form
9,320,931,169.79/12,865,950,385.04 = 7,419,181,064.99/x - Step 3: Cross multiply
9,320,931,169.79x = 12,865,950,385.04 × 7,419,181,064.99 - Step 4: Simplify right side
9,320,931,169.79x = 95,454,815,479,740,071,936 - Step 5: Solve for x
x = 95,454,815,479,740,071,936/9,320,931,169.79 - Step 6: Final answer
x = 10,240,909,812.66
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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.