Home / 209,609,142.57-289,261,802.55-121,555,421.37

Finding the Fourth Proportional to 209,609,142.57, 289,261,802.55 and 121,555,421.37

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Solution

The fourth proportional to 209,609,142.57, 289,261,802.55 and 121,555,421.37 is: 167,747,169.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,609,142.57 : 289,261,802.55 = 121,555,421.37 : x
  2. Step 2: Convert to fraction form
    209,609,142.57/289,261,802.55 = 121,555,421.37/x
  3. Step 3: Cross multiply
    209,609,142.57x = 289,261,802.55 × 121,555,421.37
  4. Step 4: Simplify right side
    209,609,142.57x = 35,161,340,295,210,992
  5. Step 5: Solve for x
    x = 35,161,340,295,210,992/209,609,142.57
  6. Step 6: Final answer
    x = 167,747,169.16

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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.