Home / 209,609,147.31-289,261,809.11-121,555,426.13

Finding the Fourth Proportional to 209,609,147.31, 289,261,809.11 and 121,555,426.13

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Solution

The fourth proportional to 209,609,147.31, 289,261,809.11 and 121,555,426.13 is: 167,747,175.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,609,147.31 : 289,261,809.11 = 121,555,426.13 : x
  2. Step 2: Convert to fraction form
    209,609,147.31/289,261,809.11 = 121,555,426.13/x
  3. Step 3: Cross multiply
    209,609,147.31x = 289,261,809.11 × 121,555,426.13
  4. Step 4: Simplify right side
    209,609,147.31x = 35,161,342,469,500,768
  5. Step 5: Solve for x
    x = 35,161,342,469,500,768/209,609,147.31
  6. Step 6: Final answer
    x = 167,747,175.74

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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.