Finding the Fourth Proportional to 211,298,569.21, 291,548,360.50 and 121,988,965.77
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Solution
The fourth proportional to 211,298,569.21, 291,548,360.50 and 121,988,965.77 is: 168,319,563.65
Step by Step Solution
- Step 1: Write the proportion equation
211,298,569.21 : 291,548,360.50 = 121,988,965.77 : x - Step 2: Convert to fraction form
211,298,569.21/291,548,360.50 = 121,988,965.77/x - Step 3: Cross multiply
211,298,569.21x = 291,548,360.50 × 121,988,965.77 - Step 4: Simplify right side
211,298,569.21x = 35,565,682,969,334,120 - Step 5: Solve for x
x = 35,565,682,969,334,120/211,298,569.21 - Step 6: Final answer
x = 168,319,563.65
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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.