Finding the Fourth Proportional to 211,298,567.21, 291,548,357.74 and 121,988,963.77
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Solution
The fourth proportional to 211,298,567.21, 291,548,357.74 and 121,988,963.77 is: 168,319,560.89
Step by Step Solution
- Step 1: Write the proportion equation
211,298,567.21 : 291,548,357.74 = 121,988,963.77 : x - Step 2: Convert to fraction form
211,298,567.21/291,548,357.74 = 121,988,963.77/x - Step 3: Cross multiply
211,298,567.21x = 291,548,357.74 × 121,988,963.77 - Step 4: Simplify right side
211,298,567.21x = 35,565,682,049,547,860 - Step 5: Solve for x
x = 35,565,682,049,547,860/211,298,567.21 - Step 6: Final answer
x = 168,319,560.89
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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.