Finding the Fourth Proportional to 138,984,221.35, 191,718,539.40 and 86,682,454.93
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Solution
The fourth proportional to 138,984,221.35, 191,718,539.40 and 86,682,454.93 is: 119,572,088.75
Step by Step Solution
- Step 1: Write the proportion equation
138,984,221.35 : 191,718,539.40 = 86,682,454.93 : x - Step 2: Convert to fraction form
138,984,221.35/191,718,539.40 = 86,682,454.93/x - Step 3: Cross multiply
138,984,221.35x = 191,718,539.40 × 86,682,454.93 - Step 4: Simplify right side
138,984,221.35x = 16,618,633,650,785,932 - Step 5: Solve for x
x = 16,618,633,650,785,932/138,984,221.35 - Step 6: Final answer
x = 119,572,088.75
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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.