Home / 209,609,144.58-289,261,805.32-121,555,423.38

Finding the Fourth Proportional to 209,609,144.58, 289,261,805.32 and 121,555,423.38

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Solution

The fourth proportional to 209,609,144.58, 289,261,805.32 and 121,555,423.38 is: 167,747,171.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,609,144.58 : 289,261,805.32 = 121,555,423.38 : x
  2. Step 2: Convert to fraction form
    209,609,144.58/289,261,805.32 = 121,555,423.38/x
  3. Step 3: Cross multiply
    209,609,144.58x = 289,261,805.32 × 121,555,423.38
  4. Step 4: Simplify right side
    209,609,144.58x = 35,161,341,213,335,736
  5. Step 5: Solve for x
    x = 35,161,341,213,335,736/209,609,144.58
  6. Step 6: Final answer
    x = 167,747,171.93

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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.